MATLAB: Multidimensional array, extracting the Nth dimension

Question

Hi all

I have an array of doubles A which has size [6,8,88].

I want to plot the vector A[1,1,:], but I get the following error:

Error using plot. Data may not have more than 2 Dimensions.

I thought that the operation A[1,1,:] would return a simple vector of length 88, as suggested by the tutorial page here

http://www.mathworks.co.uk/help/matlab/ref/colon.html

but it actually has size [1,1,88], which is causing the error.

I've thought of using a loop to extract each element, but this doesn't suit my purpose very well, as I would also like to plot A[i,j,:] for arbitrary i,j, and also perform other operations on these vectors.

Is there a simple way to access the vector A[i,j,:], and have it return a true vector?

I've reproduced the problem with a simpler example, which gives the same error.

A = zeros(3,3,4)
plot(1:4, A(1,1,:))

Sorry for simple question, I'm fairly new at this.

Many thanks for your help

Dave

Answer 1

 plot(1:4, squeeze(A(1,1,:)))

You might need to transpose the squeezed A, I can't remember :P