Sure. The NiceSlice syntax in PDL is very similar to MatLab's slicing syntax.
You want to use either:
$a->($i,:)
or
$a->slice("$i,:")
to specify the slice on the left hand side there. You may be running into the
difference between direct assignment and computed assignment. PDL
distinguishes between assignment to *create* a new PDL ("direct assignment")
and assignment to *fill* an old PDL ("computed assignment"). If you want to
put values into a slice you want the ".=" operator (computed assignment)
instead of the "=" operator (direct assignment).
On Jan 2, 2013, at 7:56 AM, Lee Goddard <[email protected]> wrote:
> I have been using PDL for about four hours now, and have got stuck with the
> following.
>
> I havethe following from MATLAB:
>
> fori=1:length(in)
> s(i,:)=exp(-((in(i)-bin_locations).^2)/sigma);
> end
>
>
> I am having problems finding out how to translate to PDL the left-hand side
> of the assignment: s(i,:)
>
> Please would somebody advise?
>
> I looked at 'set' but it apparently only sets 'a single value inside a
> piddle' [1]. It also says it has been superseded by slice, but that man page
> says slice is used to 'extract a rectangular slice of a piddle, from a string
> specifier.'[2]
>
> Incidentally, is there a good book on PDL in general, or perhaps specifically
> for MATLAB users?
>
> Many thanks in anticipation
> Lee
>
> [1] http://pdl.perl.org/PDLdocs/Core.html#set
> [2] http://pdl.perl.org/PDLdocs/Slices.html#slice
>
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