How can I concatenate an arbitrary number (#) of nxm matrices to make a 3D (# by n by m) matrix?

Suppose I had a matrix A=[1:3;4:6;7:9], and then have B=cat(3,A,A,A,A) which creates a 3rd dimension and concatenates matrix A with itself 4 times. What I would like is to do this for an arbitrary length in this new dimension without using for loops which are drastically slower than typing out A,A,A.. 100 times. Thanks in advance!

Answer 1

[Azzi Abdelmalek]

n=4 
A=[1:3;4:6;7:9]  
bsxfun(@times,A,ones(1,1,n))

[Callum]

Ah brilliant haha. I thought @times would multiply the matrices together since @plus adds them. Cheers though!