Well,
if
data=[[1, 2], [3, 4]]
then data[:,-2:] gives
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "_sage_input_25.py", line 10, in <module>
exec compile(u'open("___code___.py","w").write("# -*- coding:
utf-8 -*-\\n" +
_support_.preparse_worksheet_cell(base64.b64decode("ZGF0YVs6LC0yOl0="),globals())+"\\n");
execfile(os.path.abspath("___code___.py"))
File "", line 1, in <module>
File "/tmp/tmp4c8jhA/___code___.py", line 3, in <module>
exec compile(u'data[:,-_sage_const_2 :]
File "", line 1, in <module>
TypeError: list indices must be integers, not tuple
2012/7/23 Vegard Lima <[email protected]>
> Hi,
>
> On Mon, Jul 23, 2012 at 3:46 PM, Urs Hackstein
> <[email protected]> wrote:
> > maybe it is a silly question: Let "data" be a numpy array of floating
> point
> > numbers. Then data[:,-1] gives the last column. But how can one retrieve
> the
> > last two columns? I tried several attempts, but not succeeded.
>
> How about: data[:,-2:]
>
>
> Cheers,
> --
> Vegard Lima
>
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