[Numpy-discussion] assign a float number to a member of integer array always return integer
Chao YUE
chaoyuejoy at gmail.com
Tue May 22 09:33:21 EDT 2012
Dear all,
Just in case some one didn't know this. Assign a float number to an integer
array element will always return integer.
In [4]: a=np.arange(2,11,2)
In [5]: a
Out[5]: array([ 2, 4, 6, 8, 10])
In [6]: a[1]=4.5
In [7]: a
Out[7]: array([ 2, 4, 6, 8, 10])
so I would always do this if I expected a transfer from integer to float?
In [18]: b=a.astype(float)
In [19]: b
Out[19]: array([ 2., 4., 6., 8., 10.])
In [20]: b[1]=4.5
In [21]: b
Out[21]: array([ 2. , 4.5, 6. , 8. , 10. ])
thanks et cheers,
Chao
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Chao YUE
Laboratoire des Sciences du Climat et de l'Environnement (LSCE-IPSL)
UMR 1572 CEA-CNRS-UVSQ
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