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I want to find second and third maxima in a row of a matrix of size 1000*8
Use maxk: m = randi(99, 4, 10) % Sample small matrix. Replace with yours. row = 2; % Whatever row you want. v2 = maxk(m(row,...

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How to find the Feret Diameters of a leaf
Did you search the tags for leaf? Because there are lots of questions about analyzing leaves. Here is a solution for a single ...

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It either tells me "Too many arguments specify one" or "index in position 2exceeds array bounds" for line 9 (plot)
Evidently sim does not produce 3 output arguments. You seem to think it will give you t, x, and y. It does not. help sim Try...

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Matlab app for non matlab software holders
If you have the compiler toolbox you can compile a standalone executable for them. See the FAQ: https://matlab.fandom.com/wik...

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How to call sigmoid function inside runge kutte orde 4? Is it possibel?
To call a function from within another function, just call the function by name and pass it the arguments it wants. For example...

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Matlab ignores the initial working folder setting
Create a startup.m file and put it in a folder that is at the top of your path. You can then have it cd to whatever folder loca...

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how to calculate the area of each bin of intersection of a circle and mesh grid?
Try this: % Demo by Image Analyst to separate point sets using the convex hull. clc; % Clear the command window. close all...

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Create transparent overlay imagesc for certain values
You can use labeloverlay

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Deconvolution process of IR spectral data
Did you try conv or deconv or any related functions?

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How to detect green laser spot with nearly white center
If it worked with a green LED but not the green laser because the green laser dot is more white inside, then just fill the binar...

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All functions in a script must be closed with an 'end'.
Try this: chisquare = chi2inv(0.95,2); %inverse of the chi-square cumulative distribution function with 2 degrees of freedom at...

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BEAR Toolbox excel result not showing
Are you absolutely sure you don't already have that file open in Excel when you try to write it out (again)?

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Turning a double array into a cell array in a big program
Instead of control-F try Control-H and use the Replace All button.

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Quantifying red in a recorded video
See attached demo. I track a green Sharpie marker. You can easily adapt it to track something red in the video.

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I have a matrix with elements both real and complex.I want to find Max value within a column of that matrix ,,ignoring all the complex element in that column.
Try this: v = [1; 2; 3+2i] goodRows = imag(v) == 0 theMax = max(v(goodRows))

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Unzipping multiple folders to access one compressed file within the folder.
Did you try unzip? Did you see the FAQ: https://matlab.fandom.com/wiki/FAQ#How_can_I_process_a_sequence_of_files?

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How to load .mat file to base workspace using App Designer?
It's usually not a good idea to load variables into the base workspace. It's best if you just load it into your program as a gl...

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MATLAB loses track of directories/functions in the middle of a loop
It's hard to guess without any code. Are you sure you're providing the entire complete path to whatever function needs the fold...

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Image Segmentation Bounding Box
If you don't have a background image, you can create one by taking the mode of every pixel over all frames in the video (or as m...

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How to detect the dimension of a square section in an image ?
Try this: % Demo by Image Analyst clc; % Clear the command window. close all; % Close all figures (except those of imtool...

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Solve "MathWorks Account Unavailable - Technical Issue" with Customer Support
@Micha if you have difficulty installing or launching/running MATLAB, you can call tech support. They give free telephone suppo...

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How to detect the dimension of a square section in an image ?
Simply threshold the underlying grayscale image (not the pseudocolored image) and call bwareafilt to extract the 3 largest blobs...

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Fill the lines of incomplete triangles and form complete triangle.
Try this: % Demo by Image Analyst clc; % Clear the command window. close all; % Close all figures (except those of imtool...

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I want to extract the temperature from the IR image at every pixel
You need to "undo" the colormap and get back to the original temperature image. See my File Exchange demo: https://www.mathwor...

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how to calculate the area of each bin of intersection of a circle and mesh grid?
Is that 7 mm by 7 mm? Or pixels? If pixels you need to know how many pixels are in a mm. If you want individual areas of each...

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How to extract string/numbers after a keyword in a text
You might like to know about dictionary help dictionary

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Creating Mask to eliminate background in ROI from threshold for IR image
You forgot to attach screenshots, but I can imagine. I imagine you have a pseudocolor image of a thermal scene. I guess the wo...

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Unable to "read" Text Area
Good one: "I've confrimed name/no typos." and "My text ares is..." Ha ha. 🤣 Anyway what is selection and selection.TypeText?...

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GLOBAL VARIABLE :HOW USE IT?
See the FAQ: https://matlab.fandom.com/wiki/FAQ#Are_global_variables_bad?

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TASK Create a variable volumes that contains the last two columns of data. You can see the size of data in the output pane to the right of your screen.
Is data a 3-D array? What does this show" whos data If data is a 3-D array you need to do volumes = data(:, 3:4, :) If data...

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