[Numpy-discussion] skip lines at the end of file with loadtxt

Olivier Delalleau shish@keba...
Tue Oct 25 14:33:47 CDT 2011


Maybe try genfromtxt instead of loadtxt, it has a skip_footer option.

-=- Olivier

2011/10/25 Massimo Di Stefano <massimodisasha@gmail.com>

> i'm tring to generate an array reading a txt file from internet.
>
> my target is to use python instead of matlab, to replace this steps in
> matlab :
>
> url=['http://www.cdc.noaa.gov/Correlation/amon.us.long.data'];
> urlwrite(url,'file.txt');
>
> i'm using this code :
>
> urllib.urlretrieve('http://www.cdc.noaa.gov/Correlation/amon.us.long.data',
> 'file.txt') a = np.loadtxt('file.txt', skiprows=1)
>
> but it fails becouse of the txt description at the end of the file,
>
> do you know if exist a way to skip the X lines at the end,
>
> something like "skipmultiplerows='1,-4'" (to skip the first and the last 4
> rows in the file)
>
> or i have to use some sort of string manipulation (readlines?) instead ?
>
> Thanks!
>
> --Massimo
>
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