Fwd: [Matplotlib-users] find() applied on multidimensional arrays

[Perry G. <pe...@st...>]

It's simpler in numarray:

i,j =3D where(z<0.5)

For numeric it's more work:

ind =3D where(z.flat < 0.5)
i =3D ind//z.shape[1]
j =3D ind % z.shape[1]

One could turn this into a function for Numeric (to handle all=20
dimensionalities, etc)
On May 17, 2005, at 10:04 AM, Dimitri D'Or wrote:

> Hello,
>
> =A0
>
> Here under a question that has probably already been asked:
>
> =A0
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> I would like to apply the find() function on a bidimensional array and=20=

> receive as output the bidimensional indices for the elements matching=20=

> the condition. This is easy in Matlab but doesn't seem to be possible=20=

> with Python.
>
>  =A0
>
> Here is a short example (in Matlab code) of what I would like to have:
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> >> z=3Drand(3,3)
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> z =3D
>
> =A0
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> =A0=A0=A0 0.9501=A0=A0=A0 0.4860=A0=A0=A0 0.4565
>
> =A0=A0=A0 0.2311=A0=A0=A0 0.8913=A0=A0=A0 0.0185
>
> =A0=A0=A0 0.6068=A0=A0=A0 0.7621=A0=A0=A0 0.8214
>
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> >> [i,j]=3Dfind(z<0.5)
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> =A0
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> i =3D
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> =A0
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> =A0=A0=A0=A0 2
>
> =A0=A0=A0=A0 1
>
> =A0=A0=A0=A0 1
>
> =A0=A0=A0=A0 2
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> =A0
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> =A0
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> j =3D
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> =A0
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> =A0=A0=A0=A0 1
>
> =A0=A0=A0=A0 2
>
> =A0=A0=A0=A0 3
>
> =A0=A0=A0=A0 3
>
> =A0
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> A solution for me?
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> Thank you,
>
> =A0
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> Dimitri D'Or
>
> =A0