I have a matrix M with dimension 630x500. I want to do an average of its values along vertical direction, in order to have a matrix with smaller dimension. For example, I want to obtain a matrix with dimension 210x500: this means that, every three values along each column, I take just one (which is the average of the three values). I do this with the following code:
n=3
M = squeeze(mean(reshape(M,n,[],size(M,2))));
Let's suppose that, instead of three, I want to do an average over four values, i.e. I take just one value which is the average of the four values. This line
n=4
M = squeeze(mean(reshape(M,n,[],size(M,2))));
doesn't work, because I cannot divide 630 by four ! How can I find a way to approximate best this requirement ? For example, I can do an average over the first 628 elements (628 contains 4) and let the last two elements unchanged. How can I do this automatically once I have chosen an integer n ?
