[Numpy-discussion] Matlab -> NumPy translation and indexing

Sven Schreiber svetosch@gmx....
Wed Mar 14 09:06:17 CDT 2007


David Koch schrieb:

> 
> In Python, I tried:
> 
> A = empty((0,0))
> while ....
>     A = concatenate((A, array([someScalarValue])), 1)
> end
> 
> which returns an error since the shape of the empty A does not match the
> vector I want to concatenate with. Any way to get around this without
> having to use some obscure "if exist A" clause. I am still stuck in my
> Matlab ways - hoping to get rid of them though.

If you want a 1d-array in the end you could try empty(0) to start with,
and then do hstack((A, your_scalar)) or something like that.

hth,
sven


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