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Finding slope of a curve at some specific points
Wouldn't the average velocity just be the total displacement divided by the total time? I don't see why you need to compute the...

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I just want to keep track of the object I selected.
The Computer Vision Toolbox has some tracking capabilities. Look them up.

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How to identify such functions as addpath that are coming with MATLAB?
@Henning Søgaard and @Paul, try this: % Demo by Image Analyst to notify user if one of their m-files % is also a built-in func...

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Discussion

MATLAB Ornament
Christmas season is underway at my house: (Sorry - the ornament is not available at the MathWorks Merch Shop -- I made it wit...

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Speoial character in struct fieldname
Have them start with a letter and use underscores instead of dots. fn = {'v0_05', 'v0_10', 'v0_15', 'v0_20', 'v0_25', 'v0_30', ...

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MATLAB will not open in MacOS Sequoia15.1
If you don't get an answer here today, then I suggest you call tech support tomorrow for installation support. Do exactly what ...

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How to identify such functions as addpath that are coming with MATLAB?
Are you trying to find out what functions are called in your code so you can determine what toolboxes are needed, and which of y...

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I have an error using walsh. It says
I recreated your problem: >> walsh Execution of script walsh as a function is not supported: C:\Users\Mark\Documents\MATLAB\w...

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Why did the MATLAB runtime application worked improperly
Did a console window pop up? Can you look there for error messages? If it went away, then make sure your mcc is not using the ...

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How do I extract data from a structure using a for loop?
Not really. Fields are not ordered by number. They have names. What is the name of the "final" field in the 10 upper level fi...

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How to save and load all the states of checkboxes and etc
See the Official Mathworks support answer: https://www.mathworks.com/matlabcentral/answers/523768-how-to-save-restore-state-of-a...

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How to save and load MATLAB app?
@William, see the official Mathworks support on the topic of saving the state or values of controls from one of your app's sessi...

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Pause button not functioning
Try uiwait and helpdlg while whatever % Make some figure in the loop hFig = figure; % Then pause asking user to ...

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How to find the gait energy image(GEI) in matlab from a sequence of gait images saved in a folder?
See attached demo for averaging together all the images in a folder. It will probably work for grayscale images too.

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How can I search for all occurrences of built-in MATLAB functions called from multiple .m and .mlx files?
You might try to get a list of functions by using dir() to find all m-files in all subfolders of your MATLAB installation folder...

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Apple Silicon Mac Get an Error :"Something Unexpected Occurred" error when installing MATLAB documentation
I'd do exactly what it says in the FAQ: https://matlab.fandom.com/wiki/FAQ#During_installation,_the_installer_crashes,_hangs,_g...

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interp1 function not working properly
Like @Subhajyoti said, linspace would be the preferred way to get exactly the number of elements you want and to get it to end e...

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Extract border points from surface points (compatible with autogeneration in C)
Try alphaShape help alphaShape th = (pi/12:pi/12:2*pi)'; x1 = [reshape(cos(th)*(1:5), numel(cos(th)*(1:5)),1); 0]; y1 = [r...

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Multi parameter input multiparameter (x,y graph) output model for prediction
Sounds like a partial least squares situation since variables are related. However, why don't you give the "Regression Learner"...

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how to separate two graphe in one figure
If you want one plot or surface to be "lifted" above the other, you can add an offset to the one you want shifted. Be aware tha...

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Looking for pixel as unit
Not sure what you mean. A digital image is a matrix. A pixel is just a value at a particular location in the matrix. I don't ...

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Fingertips detection from image
Dirk-Jan Kroon has done it. See these File Exchange submissions of his: https://www.mathworks.com/matlabcentral/fileexchange/2...

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Empty MATLAB plots appearing and unable to rmeove them.
Sounds like some kind of Windows sleep quirk. They won't remain after rebooting the computer. I don't know what went wrong in ...

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Different color scale?
You need to use the colormap function to set the colormap for each axes independently. So display one image, set the colormap, ...

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Help Browser always asks for the language
Maybe cookies are blocked? Can you set up an exception to allow cookies for the mathworks site? Do you have an ad blocker? Ca...

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How to do background subtraction between two images
@Khai your code and the other answer's code here is not correct. You cannot just subtract the pseudocolored images. They MUST ...

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readtable error!!! Previously, readtable worked, but suddenly one day it started throwing an error.
Try it this way: [EDIT -- now tested with folder with CSV files in it] % Initialization steps. clc; % Clear the command wi...

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Identifying Boundary Nodes in a Point Cloud
Maybe use either pdist2 or knnsearch to identify blue points that are closest to red points. In other words, pairs that have mi...

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I received a message : "We are unable to offer you a trial." Why?
Perhaps you are already running a trial version. Perhaps you are asking for a second one too soon after you asked for the first...

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Error using .* Array sizes must match.
Add these extra lines and tell us what you see in the command window: whos mNet whos y_max whos I whos Dnet whos Q whos t ...

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