[SciPy-user] Avoiding For Loops Question
Joseph Smidt
josephsmidt at gmail.com
Fri Jun 5 12:15:50 EDT 2009
Hi,
I know that avoiding large for loops is a good way to speed up
your program. I know you can avoid a for loop like this:
for i in xrange(len(x)):
a[i] = 2.0*x[i]
as:
a[:] = 2.0*x[:]
Now, is it possible to write get around these types of for loops
using any tools from scipy?
for i in xrange(len(x)):
a[i] = i*(i+1)/2*x[i]
or this:
for i in xrange(y.shape[0]):
for k in xrange(y.shape[1]):
a[i] += x[i] + y[i][k]
or similarly:
for i in xrange(y.shape[0]):
for k in xrange(y.shape[1]):
a[i][k] = x[i] + y[i][k]
Thanks.
Joseph Smidt
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Joseph Smidt <josephsmidt at gmail.com>
Physics and Astronomy
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