[SciPy-user] loadtxt error

David Huard david.huard@gmail....
Wed Apr 23 14:35:35 CDT 2008


You can use loadtxt's converters:

>From numpy SVN, here is the docstring:

    converters : {}
      A dictionary mapping column number to a function that will convert
that
      column to a float.  Eg, if column 0 is a date string:
      converters={0:datestr2num}. Converters can also be used to provide
      a default value for missing data: converters={3:lambda s: float(s or
0)}.


David

2008/4/23, Dharhas Pothina <Dharhas.Pothina@twdb.state.tx.us>:
>
>
> Ok it looks like I had a couple of rows with values missing in the third
> column. I didn't notice before since matlab and octave assumes zeros in
> those cases. Is there a function in numpy/scipy that can read files like
> that or should I fix the file before reading it in?
>
> thanks for your help.
>
> - dharhas
>
> >>> Pauli Virtanen <pav@iki.fi> 4/23/2008 9:50 AM >>>
>
> Wed, 23 Apr 2008 16:44:16 +0200, Nils Wagner wrote:
>
> > On Wed, 23 Apr 2008 09:31:06 -0500
> >   "Dharhas Pothina" <Dharhas.Pothina@twdb.state.tx.us>
> > wrote:
> [clip]
> >> I have an ascii text file with the format :
> >>
> >> year month sumprcp(in)
> >> 1976 01 2.07
> >> 1976 02 0.76
> >> 1976 03 2.53
> >> 1976 04 2.25
> >> ...
> >>
> >> When trying to read it with the function loadtxt() I am
> >>getting an error :
> >> in iPython I type :
> >>
> >> from numpy import *
> >> year,month,data =
> >>loadtxt('portarthurcity_monthlyprecip.txt',skiprows=1,unpack=True)
> >>
> >> I get the error :
>
> No problem here either, with numpy 1.0.4. Is there garbage later on in
> the file?
>
> --
> Pauli Virtanen
>
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