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how to get the envelope of oscillating signal
Did youi look at envelope? help envelope

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How can I filtered the color of the combustion image?
Since the blue and green channels in your camera are sensitive to wavelengths in the 400 - (roughly) 600 nm light wavelengths, y...

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Hi,I tray RUN this code but i get tis error ( below the code)
@B Your index is bigger than 12784, which is the max index m90_plot can take. Put these lines in and tell us what you see in th...

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Plotting a graph based on a large table
Theo, would using imshow or imagesc work? data = readmatrix(filename); imshow(data, []); axis('on', 'image') xlabel('Colu...

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Deployed Matlab function with strage errors: functions not found
Christian: See the FAQ: https://matlab.fandom.com/wiki/FAQ#My_standalone_executable_won't_run_on_the_target_computer._What_can_...

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embedding inset plots in subplots matlab
For what it's worth (may help someone in the future) I'm attaching my demos for inserting inset plots and images inside other pl...

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Can't bring up matlab
See the FAQ and do exactly what it says to do in there: https://matlab.fandom.com/wiki/FAQ#After_installation,_MATLAB_crashes_o...

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enlarge a curved arc with rounded edges, only from the rounded edge
Try bwskel then bwmorph to find the endpoints. Mask off a certain radius from the endpoints then use imdilate to grow them bigg...

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How to segment an Image using threshold and region growing
Here's one possible way. I wrote the attached script to emulate what Adobe Photoshop's Magic Wand tool does. Also there are re...

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Region GRowing image segmentation
Here's one possible way. I wrote the attached script to emulate what Adobe Photoshop's Magic Wand tool does. Also there are re...

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Why did CD folder; give such a goofy error message when I just forgot ()
Since apploc is a variable that contains the actual folder name, you need to use the functional form of cd: cd(apploc); If you...

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How do I skip items in a legend?
Every time you plot, get the handle to the points or curves. Then pass only those that you want into legend. Here is a full de...

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Smooth noisy data whilst keep absolute minimum and maximum values
In spectroscopy there are a number of baseline correction algorithms that do what you're asking. Google it. Or search this for...

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isotropic expansion for a mask with anisotropic voxels
I'm not sure how many voxels per mm you have. Is 0.9 mm the voxel width? You can use imdilate but be aware that you'll probabl...

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How to draw isolines between points?
You have to make a continuous field (grid) of values using scatteredInterpolant. See attached demo to make that field. Then us...

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How to turn a movie into a gif?
See the official Matrhworks support team Answer: https://www.mathworks.com/matlabcentral/answers/94495-how-can-i-create-animated...

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matlab code for face detection using RGB space color && skin color
RGB is probably the worst color space you can do skin segmentation in. HSI, HSL, LCH are better? Why? Because the skin gamut ...

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Can Matlab create an Excel object and write table to it without saving it to a location?
If you're using Windows I know how to do it. You can use ActiveX programming to open Excel as a server then send commands to Ex...

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Matlab R2024b won't start due to missing dll files
Do exactly what it says in the FAQ: https://matlab.fandom.com/wiki/FAQ#During_installation,_the_installer_crashes,_hangs,_gives_...

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How programmatically know if an Update is installed for a particular matlab release?
s = ver for k = 1 : numel(s) fprintf('#%d, Using %s, Version %s, Release %s, Date %s\n', ... k, s(k).Name, s(k).Version, s...

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Not able to see where the index is going past 5
Names only has 4 strings in it, not 5 so that's why you get the error. The code is not very robust. Here, I've improved it by ...

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How to extract pixel intensity of a grayscale image (*.jpg) to a MS Excel table
See my attached demo that writes an image out to a CSV text file that can be read in by Excel.

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Extracting metrics from cellular pattern
Try this: clear all; close all; clc % Load the synthetic detonation pattern image gray_image = imread('CellularPattern_Test.p...

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What is the ratio of area of the flame between the last frame and the first? What is wrong with my approach? I am getting an incorrect answer upon submission.
Try different thresholds to see which one gives you the correct answer. Maybe you were not using the same threshold as the inst...

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Extracting metrics from cellular pattern
I think I can get fairly close. Can you give the code where you start with the image and get the binary/segmented image of the ...

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Is there a meaningful guideline on when to use parentheses vs square brackets vs curly brackets in writing MatLab code?
@Jerome yes there is. If you look at this FAQ entry: What is a cell array I think that it gives a pretty good intuitive idea ...

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This is face morphing. Now I want to save and convert to a gif image format.
That is not face morphing. Morphing is not just a weighted sum of images. The image needs to be warped before adding. So you ...

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If f1(x,y)≤z≤f2(x,y), how to draw the range of z?
Do you want just the magnitude of the range, without visualizing the starting and stopping points? If so you can just subtract ...

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Unable to create a exponential graph
I don't know how to do it in Simulink, but this seems to work fine in MATLAB: uTemperatureRange = linspace(10, 200, 1000); yDe...

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How to quantify shape similarity between two vectors.
See the Mathworks page on spectral signature matching: https://www.mathworks.com/help/images/target-detection-and-spectral-matc...

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