Re: [Numpy-discussion] extremely slow array indexing?

2006-11-30 Thread Fang Fang
) row = zeros(componentcount) #current row rowcount = 5 for i in range(1,rowcount): row[:] = 1 currSum = currSum + row; On 11/30/06, Robert Kern <[EMAIL PROTECTED]> wrote: Fang Fang wrote: > Hi, > > I am writing code to sort the columns according to the sum of each > colu

[Numpy-discussion] extremely slow array indexing?

2006-11-30 Thread Fang Fang
Hi, I am writing code to sort the columns according to the sum of each column. The dataset is huge (50k rows x 300k cols), so i have to read line by line and do the summation to avoid the out-of-memory problem. But I don't know why it runs very slow, and part of the code is as follows. Can anyone