Created
December 14, 2011 17:09
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Move along a 2D numpy array in weave/inline
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import numpy as np | |
import scipy as sp | |
from scipy.weave import inline | |
def along2Darray(rows,cols): | |
arr = np.zeros((rows,cols)) | |
code = """ | |
int Pos; | |
for(int Row = 0; Row < rows; Row++) | |
{ | |
for(int Col = 0; Col < cols; Col++) | |
{ | |
Pos = Row*cols + Col; | |
arr[Pos] = Pos; | |
return_val = 1; | |
""" | |
res = inline(code, ['arr','cols','rows'], headers = ['<math.h>'], compiler = 'gcc') | |
return arr | |
newarr = along2Darray(10,10) | |
# Things to know | |
# 1 - Narr will have infos about the size of the array, so passing 'rows' and 'cols' is not necessary | |
# 2 - inline modifies the original array, so this is not a copy. Use np.copy if you want to keep the original array intact | |
# 3 - using the blitz library allows to of arr(Row,Col) instead of finding the position |
Author
tpoisot
commented
Dec 14, 2011
via email
Ouais, bonne ide.
En attendant, je suis pass de 2e5 generations en 6 heures 1e6 gnrations en 3 heures sur mon portable. Et sur le serveur, c'est encore plus rentable
a+
t
Le 14 dc. 2011 14:41, Philippe Desjardins-Proulx a crit :
… Il faudrait essayer avec le compilateur d'intel (icc), il est hyper-rapide surtout pour les math/matrices.
Il est install sur le serveur et il est gratuit sur Linux :P
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Timothe Poisot, PhD
Universit du Qubec Rimouski
Dpartement de Biologie, Room A-017
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Rimouski (QC), G5L 3A1
Email [email protected]
Web http://www.timotheepoisot.fr/
Skype timothee.poisot
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