c(:,:,1) = 1 2 3 4 5 6 c(:,:,2) = 7 8 9 10 11 12Can anyone tell me what does (: 🙂 mean above?
MATLAB: About cat function in matlab
arraymatrix
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3 means the 2-D arrays are being stacked along the 3rd dimension. To visualize, imagine that the arrays are gray scale images in the x-y plane. Now you use cat() to stack them vertically along the third, Z, dimension. See image below, and attached demo script.
The 3-D image above would represent a color image.
Another case could be where you have lots of images, like slices from a CT or MRI scan. These images, stacked along the 3rd dimension would represent a volumetric images.
If the number were 4, then it could mean that you're stacking 3-D (color) images along the 4th dimension (representing time) to create a movie.
Does that explain it sufficiently to you?
Hello, Pat
I just give you small example.
Then, I hope you can use it or do modification on it for your purpose.
clear; clc;for cnt = 1 : 10 m = 255*rand; V = 255*rand; SD = 255*rand; filename = strcat(pwd,'\New1\A',num2str(cnt),'.txt'); fid = fopen(filename, 'w'); fprintf(fid,'mean : %.2f\n variance : %.2f\n standard dev : %.2f\n',m,V,SD); fclose(fid); end
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