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

Massimo Di Stefano massimodisasha@gmail....
Tue Oct 25 19:56:35 CDT 2011


Many thanks Oliver!

i missed it in the description,
works great :-)

--Massimo.


Il giorno 25/ott/2011, alle ore 15.33, Olivier Delalleau ha scritto:

> 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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