about cat function in matlab

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rathod ujjval rameshbhai
编辑： Stephen23 2015-8-17
c(:,:,1) =
1 2 3
4 5 6
c(:,:,2) =
7 8 9
10 11 12
Can anyone tell me what does (: :) mean above?

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dpb
dpb 2015-8-13
doc colon % can (and will)...

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Stephen23
Stephen23 2015-8-14
编辑：Stephen23 2015-8-17
The documentation is a really good place to find out how things work and what they do:
http://www.mathworks.com/help/matlab/ref/colon.html
http://blogs.mathworks.com/loren/2006/11/10/all-about-the-colon-operator/
In your examples the two colons mean "all elements along the first dimension (all rows), all elements along the second dimension (all columns)", whereas the 1 and 2 refer to the third dimension (page). To learn how MATLAB indexing works you should do the introduction tutorials:
http://www.mathworks.com/help/matlab/getting-started-with-matlab.html

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