MATLAB: Dimensional reduction by PCA

Question

I have an vector x whose dimension has to be reduced to 5 x 50 by PCA.

 [5,500]=size(x);

For that I use the code http://crcv.ucf.edu/source/dimension%20reduction/pca.m

while giving the no_dimns=50 I faced a problem

 Warning: Target dimensionality reduced to 5.

Is it possible to reduce the dimension of matrix from 5 x 500 to 5 x 50??

Answer 1

I think that the code expects you provide x' or x transpose where the rows are 500 and columns are 5