Edward C. Jones wrote:
Steven Bethard wrote:
> As mentioned, this has nothing to do with numarray, and everything to > do with your inexplicable use of lists. Why don't you just write this > as: > > arr = numarray.ones((8, 8, 256, 256), Float64)
The code I posted was simplified from a larger program which I have now revised. But I still ask: why did it take 4.3 seconds to run?
Is the simple answer not that repeated use of array.append is inefficient as python has to repeatedly re-allocate memory for the array?
No, because he wasn't appending to arrays, he was appending to lists (each only 8 items long, so there really is no significant overhead). See my response in this thread for the answer.
-- Robert Kern [EMAIL PROTECTED]
"In the fields of hell where the grass grows high Are the graves of dreams allowed to die." -- Richard Harter
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