skrasms

I would like to take a 2D matrix and get a vector out. Each element in the vector would be the average value of the corresponding column in the matrix. For a small example:

It is relatively easy to do with jit.convolve and a kernel big enough to grab every value in a column, but that seems terribly inefficient. Is there a better way to do this?

averaging-all-the-rows-in-a-matrix

way back when, I wrote an object for exactly this purpose called xray.jit.mean:

http://mat.ucsb.edu/whsmith/xray/xray.jit.mean.html

Averaging all the rows in a matrix