[SciPy-user] Convert a string list to array ?

Steve Schmerler elcorto@gmx....
Tue Feb 26 14:47:11 CST 2008


On Tue, Feb 26, 2008 at 02:09:02PM -0600, Nathan Bell wrote:
> On Tue, Feb 26, 2008 at 1:50 PM, Stef Mientki <s.mientki@ru.nl> wrote:
> >  Is there a better (more elegant) way ?
> >
> >
> >  And maybe the string list was even the wrong first step,
> >  the datafile I'm reading looks like this:
> >
> >  254 48 57
> >  58 52 53
> >  58 51 54
> >  254 32 32
> >  32 32 32
> >
> >  So there might even be better ways to start ?
> 
> Try numpy.fromfile()
> 
> A = fromfile( 'myfile.txt', dtype=int, sep=' ')
> 
> This should be very fast and memory efficient.

Isn't numpy.loadtxt designed to handle this? With fromfile I get all data in a
1d array and have to do an additional reshape() if the data in the file
represents a 2d array.

cheers,
steve


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