about cat function in matlab

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rathod ujjval rameshbhai on 13 Aug 2015

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Edited: Stephen23 on 17 Aug 2015

 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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Stephen23 on 14 Aug 2015

Edited: Stephen23 on 14 Aug 2015

What does this have to do with cat ?

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Answer 1

dpb on 13 Aug 2015

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Open in MATLAB Online

doc colon % can (and will)...

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Answer 2

Stephen23 on 14 Aug 2015

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Edited: Stephen23 on 17 Aug 2015

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