Are defenders behind an arrow slit attackable? The number of values can be 3, 5, 10, 50 or any N integer. will give you an under-approximation (in general; unless the data set is artificial) of the duration you are seeking. Toggle Sub Navigation. For example, you might want to look at interp1: Theme Copy x = 1:5; y = randn (1,5); plot (x,y,'-o') xhigh = linspace (1,5,100); yhigh = interp1 (x,y,xhigh,'spline'); hold on Call the command for function plot with the file name plot (x,y). In fact I showed you how to do it two different ways. Find the treasures in MATLAB Central and discover how the community can help you! Save plot to image file instead of displaying it using Matplotlib, Adding a legend to PyPlot in Matplotlib in the simplest manner possible, Making a line plot of a set of values in MATLAB. add $6800 and $1142.4 = $ 7924.4. The script finds the values range from 1st of . Just set the value for x_low, % x_high, and y. A,B,C are not the part of Plot. How could my characters be tricked into thinking they are on Mars? The number of values can be 3, 5, 10, 50 or any N integer. Following is described of my question. Choose a web site to get translated content where available and see local events and I have found the minimun value among them (-0.0168), and now, I would like to getting back from that value (the minimum), and to call back the corresponding WZ and J values associated Theme Copy J = [2.5 27 56]; % set it equal to y_i. I have a matrix , X=[5 6 9 8 4] Y=[8 7 2 1 9] If I plot this and I need to get position of the X value corresponds to Y=1, that means in which row the X value 8 is located? It is possible, however, to define explicit limits by using the following methods: By using xlim () and ylim () By using set_xlim () and set_ylim () By using axis () Sudo update-grub does not work (single boot Ubuntu 22.04). Sudo update-grub does not work (single boot Ubuntu 22.04). Making statements based on opinion; back them up with references or personal experience. So I have a set of y data in MATLAB, and the plot comes out as a bell shaped curve. If you want to get the values of unknown points from the figure and have to use in code then this could be helpful. Why is this usage of "I've to work" so awkward? https://www.mathworks.com/matlabcentral/answers/82050-finding-x-value-corresponds-to-a-particular-y-value, https://www.mathworks.com/matlabcentral/answers/82050-finding-x-value-corresponds-to-a-particular-y-value#comment_387639, https://www.mathworks.com/matlabcentral/answers/82050-finding-x-value-corresponds-to-a-particular-y-value#comment_387642, https://www.mathworks.com/matlabcentral/answers/82050-finding-x-value-corresponds-to-a-particular-y-value#answer_91764, https://www.mathworks.com/matlabcentral/answers/82050-finding-x-value-corresponds-to-a-particular-y-value#comment_801434. . Search Answers Clear Filters. https://in.mathworks.com/matlabcentral/answers/2951-extracting-data-series-from-fig-file#comment_2357085, You may receive emails, depending on your. Extract X,Y data from scatter plot. Unable to complete the action because of changes made to the page. The problem I'm having is I don't know how to get the x values. Add a new light switch in line with another switch? Add a new light switch in line with another switch? x-axis data is 1-9 because you did not provide any data for MATLAB to plot with. Are they actually plotted as a separate series? Find the treasures in MATLAB Central and discover how the community can help you! answer should be 4th position. How can I extract data in a vector from semilogx figure? If you plot x versus y, the values are known and therefore the problem has not relation to the plotting. I have a code that generates an EMG plot of three breathing attempts. Not the answer you're looking for? Counterexamples to differentiation under integral sign, revisited, Penrose diagram of hypothetical astrophysical white hole. A,B,C or not the part of Plot. Did neanderthals need vitamin C from the diet? MathWorks is the leading developer of mathematical computing software for engineers and scientists. First open the figure, then obtain the x and y coordinates of the line with, To obtain the value yi at the point with abscissa greater or equal then xi you can write, To extract the values between the points with abscissa x1 and x2 you can follow both strategies. Hi, how can I extract data andd save as mat file from a figure which has 3 subplots, like this: let say i have y values and need to find the corresponding location, can we find the unspecified location? Zooming a portion of figure in a figure-Matlab. Passer au contenu. You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. That means your semilogx plot is made up of 519 data series with 756 data pairs in each one. Why do American universities have so many gen-eds? i have 30,000 rand value that i want to separate 400 to 400.then i wanna plot them but the x axis should start at 0 not 400 or . The values in between are the velocities of each point. t = -0.5:1/Fs:0.5; % Time vector of 1 second. So in that case, I'd just use the x and y which are already available, and if the x is in the x array that you plotted, you can do this: in your x array, then you can use interp1() to get the interpolated/estimated y value for that x. i am so sorry for complexity the problem is that i plotted a figure of x , y then i want the program automatically uses the y value (any value) when its x value used (it is used in a loop) thanks alot for ur care. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. I'm sorry, I tought that the code was self explanatory. I need to know what the x values are at these points and get the difference between the two, thus giving me the duration. Copy. offers. As an example on figure i want to find the time of the 68.5 m/s ?? There are certain steps that you need to follow for Matlab function plot, and these are: Define the variable x, by highlighting the range of the values for x variable, for which the functions can be plotted. such a simple issue, but I am a Matlab novice. % Get the first index where 'y' is greater than some threshold thresh = 10; idx = find ( y >= thresh, 1 ); % Find 1st index where y >= thresh % Get the x value at this index xDesired = x ( idx ); Note that xDesired will be empty if there was no y value over the threshold. 1. fplot (f) This will plot the graph defined by the function y = f (x). Find the treasures in MATLAB Central and discover how the community can help you! Learn more about collect, symbolic, subs MATLAB, Symbolic Math ToolboxStep-by-step explanation. (TA) Is it appropriate to ignore emails from a student asking obvious questions? I just wrote them in Photoshop help clarify the question. How do I find this if the size of matrix is very big.. from the axes (graph) at all. Plot Multiple Data Series at Specified x values what if you want to extract data of two lines ? https://www.mathworks.com/matlabcentral/answers/383567-how-to-extract-x-y-data-values-from-matlab-figure, https://www.mathworks.com/matlabcentral/answers/383567-how-to-extract-x-y-data-values-from-matlab-figure#comment_537019, https://www.mathworks.com/matlabcentral/answers/383567-how-to-extract-x-y-data-values-from-matlab-figure#answer_305991, https://www.mathworks.com/matlabcentral/answers/383567-how-to-extract-x-y-data-values-from-matlab-figure#comment_584148, https://www.mathworks.com/matlabcentral/answers/383567-how-to-extract-x-y-data-values-from-matlab-figure#comment_1187993, https://www.mathworks.com/matlabcentral/answers/383567-how-to-extract-x-y-data-values-from-matlab-figure#comment_1962535, https://www.mathworks.com/matlabcentral/answers/383567-how-to-extract-x-y-data-values-from-matlab-figure#comment_1962595, https://www.mathworks.com/matlabcentral/answers/383567-how-to-extract-x-y-data-values-from-matlab-figure#comment_2169550, https://www.mathworks.com/matlabcentral/answers/383567-how-to-extract-x-y-data-values-from-matlab-figure#comment_2274400, https://www.mathworks.com/matlabcentral/answers/383567-how-to-extract-x-y-data-values-from-matlab-figure#answer_619987, https://www.mathworks.com/matlabcentral/answers/383567-how-to-extract-x-y-data-values-from-matlab-figure#answer_1050830. If you don't have the abscissae and you are creating the plot by only providing y as input to the plot function, i.e., plot(y), then the y values are plotted against the vector 1:length(y). Not the answer you're looking for? With the first you could write. But i cannot seem to do that when the dialog box prompt comes up. Connect and share knowledge within a single location that is structured and easy to search. If the resolution of your data is high, it is likely that it will be a good approximation. How to get the 3rd column in an array by using 1st and 2nd column values as index in Matlab; Get list of property names and values for a MATLAB plot; Confusion in figuring out the relation between actual frequency values and FFT plot indexes in MATLAB; Retrieving X and Y values from Matlab Plot; How do I make the colorbar of my image plot in . Vai al contenuto. The peak goes from 0 to .25, and what I need is the duration of this peak with a threshold of .05. Are the S&P 500 and Dow Jones Industrial Average securities? x_low=-100; %the lowest value of x that the for loop could possibly output. Find the treasures in MATLAB Central and discover how the community can help you . Reload the page to see its updated state. Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. I want to get some specific values from a Matlab Figure. But if you want to find corresponding time value for max velocity, first you need to find index of it. offers. If you choose to interpolate tou can construct a new set of points, and interpolate over that set. Please explain this by editing the original questions. PP may then, evaluated via PPVAL. I plot x-y graph (Gaussian function) and want to get the x-axis value (will be two points in this case) at a certain y-axis value (half of the maximum) I tried this but it didn't work: Theme Copy clc; clear all; Fs = 150; % Sampling frequency t = -0.5:1/Fs:0.5; % Time vector of 1 second x = 1/ (sqrt (2*pi*0.01))* (exp (-t.^2/ (2*0.01))); figure; I want to be able to have the cursor move on the actual plot, and by clicking it, I get the (x,y) coordinate of my plot (in this case, the time and the value of sine). If you don't have the abscissae and you are creating the plot by only providing y as input to the plot function, i.e., plot (y), then the y values are plotted against the vector 1:length (y). Why did the Council of Elrond debate hiding or sending the Ring away, if Sauron wins eventually in that scenario? sites are not optimized for visits from your location. I want to find x value given y value, y value is [0.2 0.4 0.7 0.9 1.0] %Finding X value with known Y value on plot clc; clear all; close all; x= 0:0.01:5; y= [0.2 0.4 0.7 0.9 1.0] [X, Y] = me. If you only care about this specific vector y, you could manually adjust the calculation since the plot command already did linear interpolation by default when invoked. kedarps 851 Reference: stackoverflow.com POPULA POST how i can write these at the command window ? https://www.mathworks.com/matlabcentral/answers/86764-getting-data-from-plot, https://www.mathworks.com/matlabcentral/answers/86764-getting-data-from-plot#comment_503858, https://www.mathworks.com/matlabcentral/answers/86764-getting-data-from-plot#answer_96318, https://www.mathworks.com/matlabcentral/answers/86764-getting-data-from-plot#comment_169060, https://www.mathworks.com/matlabcentral/answers/86764-getting-data-from-plot#comment_169068, https://www.mathworks.com/matlabcentral/answers/86764-getting-data-from-plot#comment_169131, https://www.mathworks.com/matlabcentral/answers/86764-getting-data-from-plot#comment_482718, https://www.mathworks.com/matlabcentral/answers/86764-getting-data-from-plot#comment_1448607, https://www.mathworks.com/matlabcentral/answers/86764-getting-data-from-plot#comment_1458001, https://www.mathworks.com/matlabcentral/answers/86764-getting-data-from-plot#comment_1964845, https://www.mathworks.com/matlabcentral/answers/86764-getting-data-from-plot#answer_96292, https://www.mathworks.com/matlabcentral/answers/86764-getting-data-from-plot#comment_169059, https://www.mathworks.com/matlabcentral/answers/86764-getting-data-from-plot#comment_169132, https://www.mathworks.com/matlabcentral/answers/86764-getting-data-from-plot#comment_169133, https://www.mathworks.com/matlabcentral/answers/86764-getting-data-from-plot#comment_169136, https://www.mathworks.com/matlabcentral/answers/86764-getting-data-from-plot#comment_169268, https://www.mathworks.com/matlabcentral/answers/86764-getting-data-from-plot#answer_96291, https://www.mathworks.com/matlabcentral/answers/86764-getting-data-from-plot#comment_169057, https://www.mathworks.com/matlabcentral/answers/86764-getting-data-from-plot#answer_302068. Accepted Answer Star Strider on 8 Nov 2014 or flow_depth = y (end,:); Sign in to comment. Why does the distance from light to subject affect exposure (inverse square law) while from subject to lens does not? Then select in menu Tools-Brushing-Create new variable. Navigazione principale in modalit Toggle . Unable to complete the action because of changes made to the page. Ready to optimize your JavaScript with Rust? Note: On every execution of the code input values can be different. I have added some comments. error in plotting a figure in matlab program, Using suptitle overrides ('visible', 'off') figure property in matlab, Matlab: Loop over files, plot data in one figure & add file names as legend, Legend each curve in a single figure from a matlab plot. The script works for specific years but not for some because of not same vector size. The plot is created over the default interval [-5, 5]. I want to find x value given y value, y value is [0.2 0.4 0.7 0.9 1.0] %Finding X value with known Y value on plot clc; clear all; close all; x= 0:0.01:5; y= [0.2 0.4 0.7 0.9 1.0] [X, Y] = me. Like in sample pictures. I guess the most simple way is to zoom in and see the value, but there are about 1 thousand data to work with. MATLAB plots every column as a seperate curve. It is working, I've already do that but I need the flow depth numerically (y) at the end of my channel (x=xmax). I plot x-y graph (Gaussian function) and want to get the x-axis value (will be two points in this case) at a certain y-axis value (half of the maximum) I tried this but it didn't work: Theme. Man, I just spent so long trying to figure this out. You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. Unable to complete the action because of changes made to the page. 1 Link If you want to get the values of unknown points from the figure and have to use in code then this could be helpful. Accelerating the pace of engineering and science. Please help me Guillaume on 29 Aug 2016 @Pooja Patel Theme Copy value = find (Y == Y) Do you want the y values exactly at the position of an x value, or are you interested in x values between two given x values also? But perhaps you have a Figure file and lost the x and y values. Thanks for contributing an answer to Stack Overflow! plot (X,Y) creates a 2-D line plot of the data in Y versus the corresponding values in X. your location, we recommend that you select: . To plot multiple sets of coordinates on the same set of axes, specify at least one of X or Y as a matrix. After the plot code i have an input prompt that asks user to select closest x axis value for one of the chosen 3 attempts. . Ready to optimize your JavaScript with Rust? Cooking roast potatoes with a slow cooked roast. i have 30,000 rand value that i want to separate 400 to 400.then i wanna plot them but the x axis should start at 0 not 400 or 800 or.any help please? C is one point of x'ay' coordinate. how to create different matrices? Explain why my code does not do what you want. Matplotlib generates the minimum and maximum values of variables to be presented along the x, y (and z-axis in the case of a 3D plot) axes of a plot automatically. Connecting three parallel LED strips to the same power supply. How do I find this if the size of matrix is very big.. I don't have the x values, and .05 isn't an actual data point in the y vector. sites are not optimized for visits from your location. Skip to content. Then just run mean (ans (:,2)) to get average of Ys. Doing this will give you equal spacing. The rubber protection cover does not pass through the hole in the rim. Click brush icon on the figure toolbar and make a selection. Is it cheating if the proctor gives a student the answer key by mistake and the student doesn't report it? Theme Copy yDesired = interp1 (x,y, desiredXValue); 7 Comments on 1 Feb 2022 Sign in to comment. We do not currently allow content pasted from ChatGPT on Stack Overflow; read our policy here. Define the function, y = f (x) Call the plot command, as plot (x, y) Following example would demonstrate the concept. Connect and share knowledge within a single location that is structured and easy to search. You can leave default variable name ans. thank u very muchi am so happy to know such helpful men like u , Jan Simon and Ilham Hardy. MaxVelocity = max (Y) This will imply the peak value of your velocity profile. How does legislative oversight work in Switzerland when there is technically no "opposition" in parliament? MATLAB Answers. To learn more, see our tips on writing great answers. Is this possible? ? How to plot two histograms together in R? Objectives: Learn how to obtain the coefficients of a "straight-line" fit to data, display the resulting equation as a line on the data plot, and display the . To learn more, see our tips on writing great answers. Is the EU Border Guard Agency able to tell Russian passports issued in Ukraine or Georgia from the legitimate ones? xvalue = interp1 (y_bluesignal,x_bluesignal, 50.05) and idx = find (y_bluesignal == 50.05); Xidx = x_bluesignal (idx); may work if there is an entered data point at y=50.05 (use a tolerance as in the above comments if this is a calculated value), the interp method will work regardless Share Improve this answer Follow edited Aug 29, 2018 at 16:01 In order to find the maximum value, you need to employ some MATLAB functions (max and find). Reload the page to see its updated state. Some explanation would improve this answer. like what is "xi"? The output of our example will be as shown below: I have a matrix , X= [5 6 9 8 4] Y= [8 7 2 1 9] If I plot this and I need to get position of the X value corresponds to Y=1, that means in which row the X value 8 is located? When would I give a checkpoint to my D&D party that they can return to if they die? How can I get it? MathWorks is the leading developer of mathematical computing software for engineers and scientists. Appealing a verdict due to the lawyers being incompetent and or failing to follow instructions? matlab ,MATLAB GUI_cherry- matlab ; So far you just know the max value. To get the number of values above threshold = 0.05 you can type. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. clc; clear all; Fs = 150; % Sampling frequency. To comment a single or two lines of code, we can use the % character . Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. Introduction to Matlab Plot Multiple Lines. If you have a chart and you just want to find out the values of arbitrary points on the chart you can use the ginput function or by far the simplest solution is to just use the interactive data cursor built into the figure window. Help us identify new roles for community members, Proposing a Community-Specific Closure Reason for non-English content. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide. Sign in to answer this question. . I would really appreciate any help anybody could offer, I've been stuck trying to do this for the past 6 hours. did anything serious ever run on the speccy? But you did not explained the code. Since you are setting your marker color, you probably noticed that (each series is assigned a different color To plot a set of coordinates connected by line segments, specify X and Y as vectors of the same length. Lets normalise our X values so the data ranges between -1 and 0. Drawnow on Matlab: It store the figure or store the variable? I have two excel files, the script extracts the data from the 2 files. We do not currently allow content pasted from ChatGPT on Stack Overflow; read our policy here. So, How to convert C position to xy coordinate?? Matlab has the ginput for getting the (x,y) value of where you have clicked on the graph. The first line intersects the set of points that follow x1 with the set of points that precede x2, and the return the indices. Find centralized, trusted content and collaborate around the technologies you use most. Help us identify new roles for community members, Proposing a Community-Specific Closure Reason for non-English content. Would salt mines, lakes or flats be reasonably found in high, snowy elevations? See that section for details. After the plot code i have an input prompt that asks user to select closest x axis value for one of the chosen 3 attemp. How can I plot a pattern of random points in a specific region? Otherwise, you could look at the interpolation commands, if you want the whole process automated and repeatedly executed. So, that means you have 6 curves and 9 data points for each curve. MATLAB: get min x value of struct of vectors matrix get min values of a matrix before max values occurred OpenCV can not get the right max and min values of Mat matlab how to get min value and its index in a matrix python matplotlib specgram () max plot value appears incorrect Replace -inf by min and +inf by max value in matlab array Did the apostolic or early church fathers acknowledge Papal infallibility? I just wrote them in Photoshop help clarify the question. In this method, we need to specify the automatic method that is tight and padded. Based on this matrix I want to create a 3D plot, where one axis is my x-direction, the second axis is my y-direction and the third axis is the velocity changes. Share If you did that unwise thing, then it's possible to extract your data from the graph, which has, in effect "stored" it. Accelerating the pace of engineering and science. Furthermore, you probably want the wrong thing. I just Wrote them in Photoshop to make Understand the Question. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Find centralized, trusted content and collaborate around the technologies you use most. How is the merkle root verified if the mempools may be different? So basically what this means is that since this is a bell shaped curve, there are 2 instances where y = .05. Is there any way I can do this, or is this impossible? please find the attachment; in the figure, there are two data values. How to get x coordinates from a matrix - MATLAB Answers - MATLAB Central How to get x coordinates from a matrix Follow 2 views (last 30 days) Show older comments Jin Chua on 1 Feb 2017 0 Commented: Star Strider on 5 Feb 2017 I have a matrix with pixel values and zeros. Learn more about plot, graph, input prompt, prompt MATLAB . You already have x, and y since you plotted it, so there's no need to extract. Appealing a verdict due to the lawyers being incompetent and or failing to follow instructions? To get the number of values above threshold = 0.05 you can type above_thresh_count = length (y (y>=threshold)); If the implied time step is Ts, then Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, What are those points (A, B, C) etc? However, say that I have plotted a graph with plot (t, sin (2*pi*t)). Asking for help, clarification, or responding to other answers. Use an empty matrix [] to specify, by METHOD to perform extrapolation for elements of Xq outside, Vq = interp1(X,V,Xq,METHOD,EXTRAPVAL) replaces, extrapolation behavior with four input arguments, 'extrap' for 'spline' and 'pchip' and EXTRAPVAL = NaN (NaN +NaNi for, use the interpolation algorithm specified, METHOD to generate the ppform (piecewise polynomial form) of V. The, may be any of the above METHOD except for 'v5cubic'. The length of the input values (Graph Values) can also change every time. Let us plot the simple function y = x for the . thank u alot ,,, i found ur answer very useful,,,,,,, i only wanted to explain my question. How can I get the x and y coordinates of this matrix to create a 3D surface? if you plot, in section tools,basic fitting you can evaluate, I agree with Jan - it's ambiguous. rev2022.12.9.43105. Running the for loop, ends up in having created a slope matrix, with 3 values inside, which reprenset 3 different slopes. Start Hunting . Theme Copy delete 2.fig; savefig ('2.fig'); open ('2.fig'); h = gcf; %current figure handle axesObjs = get (h, 'Children'); %axes handles dataObjs = get (axesObjs, 'Children'); %handles t xdata = get (dataObjs, 'XData'); Find the treasures in MATLAB Central and discover how the community can help you! MATLAB will plot each column as its own series. Is it cheating if the proctor gives a student the answer key by mistake and the student doesn't report it? Haupt-Navigation ein-/ausblenden . It will just replace 1-9 with your array. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Other MathWorks country and what if i want to take range of values form Point A to B ? Respected Image Analyst gave the best answer; I am just simplifying it with examples. Choose a web site to get translated content where available and see local events and Isn't that exactly what I just showed you how to do? Learn more about matrices, plot MATLAB. I first plot data using the scatter function, and then set the x-axis and y-axis limits. PPVAL(PP,Xq) is the same as, You may receive emails, depending on your. I need to plot the water level for each specific year on y axis and ice conentration average on x axis. t = -0.5:1/Fs:0.5; % Time vector of 1 second. i have 30,000 rand value that i want to separate 400 to 400.then i wanna plot them but the x axis should start at 0 not 400 or 800 or.any help please? so if i want, You may receive emails, depending on your. Can a prospective pilot be negated their certification because of too big/small hands? I'm using the ode45 (x,y) for solve an open channel flow problem (plot the surface profiles). This requires user to zoom in on generated plot. Where does the idea of selling dragon parts come from? I plot an x , y graph can i ask the programme to tell me the value of y for the value of x i want ? In the first case consider, that numerical comparisons are bounded by the numerically limited precision: % Linear interpolation [EDITED, not "linspace"]. The question is not clear. Other MathWorks country Based on 4 Answers Sorted by: 2 Another option is to use data brush. Learn more about scattered data, extract value, plot . I want to find x value given y value, y value is [0.2 0.4 0.7 0.9 1.0] %Finding X value with known Y value on plot clc; clear all; close all; x= 0:0.01:5; y= [0.2 0.4 0.7 0.9 1.0] [X, Y] = me. please why we wrote this,,,,,,,,,,,,,,,,, LineH = get(gca, 'Children'); x = get(LineH, 'XData'); y = get(LineH, 'YData'); , for example by calling the clear('x') command. answer should be 4th position. Like in sample pictures, I want to get values of A, B, C. in form of e.g A= (430,0.56). or in opposite, if C is one point of xy coordinate, how to get position of C in x'y' coordinate? Based on Note that MATLAB represents irrational numbers such as pi with rational approximations, except when using the symbolic math toolbox. Other MathWorks country rev2022.12.9.43105. Why is it so much harder to run on a treadmill when not holding the handlebars? Zooming in on generated graph in order to get. Theme. x_high=100; %the highest value of x that the for loop could possibly output. Making statements based on opinion; back them up with references or personal experience. Enter the formula in terms of x inside the for loop and. How to changes X Y coordinate System and get value point? I want to get values of A, B, C. in form of e.g A=(430,0.56). Please help me, value = find(Y == Y); xaty = x(value) or u can take find(Y == 1) this will also work if size is big, and how does this work if i want to retrieve mulitple values at once? How I can get specific values from Matlab Figure. Weiter zum Inhalt. Getting an x values from a plot in MATLAB. (interpolation etc..) How can I do that? Copy. Now, I create new XY coordinate with a is original point. Based on sites are not optimized for visits from your location. i need the x and y values of this data. I want to get some specific values from a Matlab Figure. MATLAB stores rational numbers as doubles by default, which is a measure of the number of decimal places that are stored in each variable and thus of how accurate the values are. This is how our input and output will look like in MATLAB command window: Input: x = linspace (0, 3*pi, 50); y = sin (x); plot (x,y) hold on y1 = cos (x); plot (x, y1) hold off title ('Trigonometric waves', 'Sine & Cos wave') Output: As we can see in the Output, we have obtained a plot of a sine and cos wave with the required title and a sub-title. >> x=1:1:100; >> y=5*x+10; >> yDesired = interp1(x,y, 10), =====================================================================================, >> y=5*x.^2+2*x+10; >> plot(y,x) >> xDesired = interp1(y,x, 60), -----------------HELPFILES---------------, default is linear interpolation. Sign in to comment. Issue Plotting 2 different Values. That's all true, but we should probably stop to tell Karim that MATLAB does have a lot of tools for evaluating points on some of those many interesting functions. I have a matrix, where the first row is my x direction and the first column is my y direction. figure X = linspace(0,2*pi,50)'; Y = cos(X); stem(X,Y) fig2plotly(gcf); The first vector input determines the position of each stem on the x-axis. 1. Try this code, Its working for me Code is according to Time and Y figure. How to smoothen the round border of a created buffer to make it look more natural? To plot the graph of a function, you need to take the following steps . You can also select a web site from the following list: Select the China site (in Chinese or English) for best site performance. Plot Single Data Series at Specified x values Plot 50 data values of cosine evaluated between 0 and 2 and specify the set of x values for the stem plot. Thanks for contributing an answer to Stack Overflow! By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. After that, we need to enable the auto limit selection. A,B,C are not the part of Plot. Something can be done or not a fit? . Define the function, y = f (x). Effect of coal and natural gas burning on particulate matter pollution, 1980s short story - disease of self absorption. offers. your location, we recommend that you select: . Therefore, I want to give a commend that orders to give the y-value at certain x-value. More Answers (3) Copy. Great explanation. How many transistors at minimum do you need to build a general-purpose computer? Check out the. I have the axis limits and style set to 'equal', so when the limits are changed, the size of the plotting area is automatically changed to maintain the correct aspect ratio. clc; clear all; Fs = 150; % Sampling frequency. Automatic xlim () selection: In this method, we specify the limit for the current axis or chart by using an automatic way. Step 1: to get the total amount you would pay for 4 years add the principal amount &6800 and the APR 4.2% = 285.6x 4 years = $1142.4 interest for 4 years. This variable will contain X and Y coordinates of all selected points. Asking for help, clarification, or responding to other answers. your location, we recommend that you select: . x = 1:100; % Initialise plot handle h = plot (nan,nan); for iter = 1:1e2 y = rand + rand*x + rand* (x.^2 ); % set appropriate values of handle set (h, {'XData','YData'}, {x, y}); drawnow; end This way, a plot handle is created only once, and its properties are set in the loop. Define x, by specifying the range of values for the variable x, for which the function is to be plotted. Choose a web site to get translated content where available and see local events and Why do American universities have so many gen-eds? Basically, there are two ways to implement the xlim () function in Matlab as follows. Accelerating the pace of engineering and science. MathWorks is the leading developer of mathematical computing software for engineers and scientists. I plot x-y graph (Gaussian function) and want to get the x-axis value (will be two points in this case) at a certain y-axis value (half of the maximum) I tried this but it didn't work: Theme. % This code solves for x given a value of y. Let's understand this function with the help of an example: fplot (@ (x) x^2) Here we have taken square function as the one which we need to plot. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Reload the page to see its updated state. How to say "patience" in latin in the modern sense of "virtue of waiting or being able to wait"? If there isn't a data set, it would be nice to get the value of how the plot line is drawn for the points. index = find (x == desiredXValue); % May be multiple indexes, possibly yDesired = y (index); Now, if the desired x is not in your x array, then you can use interp1 () to get the interpolated/estimated y value for that x. 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