Saving a functiong graph inside a matrix

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Andrea Baleani
Andrea Baleani 2021-10-13
评论： Andrea Baleani 2021-10-13
I am working on edge detection algorithms and i need to produce matrices which cointain graphs of various functions. They need to be in black-white format (no RGB three layer matrices).
For example if i use linspace and build up the graph of y=x^2 how do i save the plot in a non RGB matrix ?

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Dave B
Dave B 2021-10-13
Ran in:
You can use im2gray to convert an RGB matrix to grayscale:
x = linspace(-5,5,100);
y = x.^2;
plot(x,y)
fr=getframe(gca);
gray_image=im2gray(fr.cdata);

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