Finding the correlation matrix

Question

I have a matrix which is fairly large (around 50K rows), and I want to print the correlation coefficient between each row in the matrix. I have written Python code like this

Answer 1

you can use the python multiprocess module, chunk up your rows into 10 sets, buffer your results and then print the stuff out (this would only speed it up on a multicore machine though)

http://docs.python.org/library/multiprocessing.html

btw: you'd also have to turn your snippet into a function and also consider how to do the data reassembly. having each subprocess have a list like this ...[startcord,stopcord,buff] .. might work nicely

def myfunc(thelist):
    for i in xrange(thelist[0]:thelist[1]):
    ....
    thelist[2] = result