Thread: MATLAB: The cat command

Hi guys

Say I have two 2x2 matrices A and B. If I use the command

Code:

c=cat(3,a,b)

then c(:,:,1) is A and c(:,:,2) is B. Now, if I use c=cat(2,a,b) I get a rowe, and if I use c=cat(1,a,b) I get a 2x2 matrix. What is the logic behind the last two commands?

Google "help matlab cat"

CB

Originally Posted by CaptainBlack

Google "help matlab cat"

CB

I found http://www.mathhelpforum.com/math-he...t-command.html, but why does it add the matrices vertically when using the first dimension and horizontally with the second dimension? They do now explain that.

Is it just a convention?

Originally Posted by Niles_M

I found http://www.mathhelpforum.com/math-he...t-command.html, but why does it add the matrices vertically when using the first dimension and horizontally with the second dimension? They do now explain that.

Is it just a convention?

It is not a convention, the first argument defines the sense of the concatenation (as per the help files)


CB

Originally Posted by CaptainBlack

It is not a convention, the first argument defines the sense of the concatenation (as per the help files)


CB

I get it, thanks!