Hey, I have some code that I wrote with my Enthought python
distribution on my laptop which uses the ix_ command for arrays and
matrices in numpy, for example:

a=array([1,2,3,4,5,6])
b=[3,4]
a[ix_(b)]

gives: array([4,5])

but when using Sage on the computers at work it does not recognize
this command (regardless of whether I start up in sage, python, or
ipython). Having looked at the documentation I have found the sage
command matrix_from_rows_and_columns which seems to do the same job,
but that requires the array or matrix to be made into a Sage matrix,
which I would prefer not to do so as to have compatibility across
multiple platforms. Is there a way around this or a specific reason
why Sage does not support the ix_ command?

Thanks,
Joe

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