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How to make MATLAB read the environment variable JAVA_HOME
Maybe try using setenv to set it up in your startup.m file.

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Image analysis - Bounding Box converted to Circular Mask
To display circles rather than bounding boxes, you can just ask regionprops for the Centroid and EquivDiameter. Then use viscir...

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How do I find the corner points of an mask
Depending on the shapes you're dealing with, convhull may work for you.

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How to skip missing time durations in a time-series heatmap (image based figure)
I don't think putting in nans where you don't want it to plot is "klunky" - we do it all the time. Go ahead and do it if that w...

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Can Matlab automatically detect a new value in Excel?
How about if you use dir to get the file date/time stamp and then if it's later than the last time you processed it then Stella ...

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Can Matlab automatically detect a new value in Excel?
If you're using Windows and ActiveX, you can check out the properties and methods here: https://learn.microsoft.com/en-us/dotne...

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10x10 Matrix
Alternatively (since you already have a solution to your homework problem from the other Answer) you can do m = 10 * rand(10); ...

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How to eliminate this white haze when taking a photo?
@DGM makes some good suggestions. Glare and haze are caused by excess bright light scattering around your camera's optical syst...

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How would I use a 2D array based on a topographical map to determine the steepest direction at each point?
Try imgradient or imgradientxy Since this is a homework problem, if you have any questions ask your instructor or read the link...

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failing to normalize columns of matrix from 0 to 1
Try rescale for ii = 2 : 2 : size(A, 2) A(:,ii) = rescale(A(:,ii), 0, 1); end

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yticks function gives error with subplot function
Like I and everyone else says, your code runs for us and the error message indicates you have a variable called yticks. Set a b...

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How to create animation smiling face?
See attached demos and adapt as needed. Also see this tutorial on how to make animated GIFs. https://www.mathworks.com/matlabc...

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Adding White Gaussian Noise to an Image.
Try imnoise

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how to load from text file to listbox
You can use readlines to read the lines of the text file and then put them into the listbox. For App Designer, it would be some...

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How do I start using MATLAB Copilot?
@翼 in the meantime, try doing what you said here: https://www.mathworks.com/matlabcentral/playground?s_tid=gn_mlc_playground

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Which one is the best?
You can try them all out in the Classification Learner app on the Apps tab of the tool ribbon. You can try them with your actua...

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Help with getting data from image at equidistant positions from the centre - to include the "off circle corners"
@Jason, ok try this - it may be a little more intuitive: grayImage = imread('cameraman.tif'); [rows, columns, numColorChannels...

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Help with Matlab code
The colon, :, means "all" so MD2(7,:) = MD2(7,:)+MS(1,:)+MS(15,:); means set all columns in row 7 of MD2 to be what they orig...

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How to change the legend format to “Descriptive text + icon”
That's because legend() does not have any children, much less of types text and patch: x = 1:10; y1 = x; y2 = x.^2; plot(x, ...

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Obtain intensity values within the ROIs drawn on image in this script. Then, write and display intensity values within the ROIs on the image.
Since your rectangles are adjacent, you can use blockproc. It's a function meant for exactly this kind of operation. See attac...

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Help with getting data from image at equidistant positions from the centre - to include the "off circle corners"
See attached demo. Adapt as needed, for example change mean to median.

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How do I remove the colored area on a part of the map?
The whole image, even the gray stuff and tick mark labels? Or just the colored parts? Try this: % Demo by Image Analyst % In...

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Converting a image matrix from RGB to XYZ color space
% In range 0-1 srgb=rand(24,3); [xyz2D]=convertsrgb2xyz(srgb) % uint8 variables in range 0-255 srgbUint8 = uint8(255 * rand...

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Periodic Boundary condition feature in image analysis tools
It can be done but it's a bit tricky. You can call imclearborder and then use find() to find out which blobs have pixels in com...

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write a program that asks the user for the input of a number and returns the natural logarithm of the number if the number is posative, and displays a error message otherwise
If you have any questions about this homework problem, ask your instructor or read the link below to get started: How do I get ...

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Remove ignored complex values from a plot
Anything set to nan will not plot so you can set the imaginary locations to nan: imagLocations = (imag(y) ~= 0) % Set those lo...

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Fit Ellipse to structure in image
See the FAQ: https://matlab.fandom.com/wiki/FAQ#How_can_I_fit_an_ellipse_or_other_shape_to_a_set_of_XY_data? or see the attach...

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how to display both a text and a userInput on mask using system object?
Maybe try using sprintf with the names of your variables to create a string and then combine into a cell array of strings of dif...

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OCR not detecting numbers
Maybe it's too big. Try shrinking it down to smaller images: %-------------------------------------------------- % Read in or...

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Data Extraction from Image
I'd work on getting the formulas that generated that image instead of trying to do OCR on all the numbers in that image and some...

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