Combining columns in matrix - python

Question

I'm trying to do something fairly simple. Given a matrix, I want to combine the column elements such that:

a = [[1,2,3], [4,5,6], [7,8,9]]

...and I want to return:

[[1,4,7],[2,5,8],[3,6,9]]

This loop might be very simple, but I keep running into iteration errors or index out of range errors.

Thanks!

score 2 · Accepted Answer · answered Aug 22 '14 at 14:20

2

How about using zip():

zip(*a)

answered Aug 22 '14 at 14:20

jh314

Thank you! I knew there had to be a simple method. My apologies for my ignorance – Jeremy Thomas Aug 22 '14 at 14:45

1 Answers1