[Numpy-discussion] a 'for' loop within another 'for' loop?
Paul F. Dubois
paul at pfdubois.com
Wed Jul 14 05:57:07 CDT 2004
array([ 0, 2, 5, 6, 8, 2, 4, 7, 8, 10, 5, 7, 10, 11, 13, 6,
8, 11, 12, 14, 8, 10, 13, 14, 16])
Always like a good challenge in the morning. God, it is like the old
rush of writing APL.
Hee-Seng Kye wrote:
> Hi. I wrote a program to calculate sums of every possible combinations
> of two indices of a list. The main body of the program looks something
> like this:
> r = [0,2,5,6,8]
> l = 
> for x in range(0, len(r)):
> for y in range(0, len(r)):
> k = r[x]+r[y]
> print l
> 1. I've heard that it's not a good idea to have a 'for' loop within
> another 'for' loop, and I was wondering if there is a more efficient way
> to do this.
> 2. Does anyone know if there is a built-in function or module that would
> do the above task in NumPy or Numarray (or even in Python)?
> I would really appreciate it if anyone could let me know.
> Thanks for your help!
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