How to find the minimum values in chunks of each column in a large matrix

I have a large matrix with 10s of columns and 100s of rows. I essentially want to find the minimum value of each column in four parts. I want to take those values and put them into a matrix with four columns containing the four minimum values from each column of the original matrix. Can anyone give me some insight on getting this started?

Answer 1

[Walter Roberson]

squeeze(min(reshape(YourMatrix, size(YourMatrix,1)/4, 4, size(YourMatrix,2)))

If your matrix does not have a multiple of 4 for rows or you do not want the division to be equal, then more work would have to be done.

[Anthony Padilla]

The number of rows is 359 in each case, so the 4 sections will not be equal. I want it to find the minimum from rows 1-91, 92-180, 181-270, and 271-359.