[Numpy-discussion] Help using numPy to create a very large multi dimensional array

Christopher Barker Chris.Barker@noaa....
Wed Apr 18 11:11:32 CDT 2007

Bruno Santos wrote:
> Finally I was able to read the data, by using the command you sair with 
> some small changes:
> matrix = numpy.array([[float(x) for x in line.split()[1:]] for line in 
> vecfile])

it doesn't sound like you're concerned about the speed of reading the 
files, but you can still use fromfile() or maybe fromstring() to do 
this. You just need to read past the text part first, then process it.

using fromstring:

matrix = numpy.vstack([numpy.fromstring(line.split(" ", 1)[1], sep=" ") 
for line in vecfile])

or something like that.


Christopher Barker, Ph.D.

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