[Numpy-discussion] [mailinglist] How to do: y[y<T] = y+T

Uwe Schmitt uschmitt@mineway...
Mon Oct 27 06:45:44 CDT 2008


Nicolas ROUX schrieb:
> Hello,
>
> I hope this is not a silly question ;-)
> I have a Numpy array, and I want to process it with :
>   "if the value is lower than Threshold, then increase by Threshold"
>
>
> I would like to translate it as:
>  y[y<Treshold] = y + Treshold
>   
Hi,

your solution does not work, becaus the arrays on both
side do not have the same size in generall.

You can do it in place:

    y[y<T] += T

or explicitely (slower/more memory):

    y[y<T] = y[y<T] + T

Greetings, Uwe
> To benefit from the Numpy speed.
> But this doesn't work, any idea ?
>
> Thanks,
> Cheers,
> Nicolas.
>
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> Numpy-discussion@scipy.org
> http://projects.scipy.org/mailman/listinfo/numpy-discussion
>
>   


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Dr. rer. nat. Uwe Schmitt
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