Many thanks!
I've been programming Perl since 1996, and was loosing faith in the
language until I found PDL -- a whole new world!
Thanks again
Lee
On 02/01/2013 16:26, David Mertens wrote:
Lee -
In addition to this mailing list, you can hop on to the #pdl irc
channel at irc.perl.org <http://irc.perl.org> for a live discussion
group. If you don't have an irc client or have never used one, follow
this link: http://www.mibbit.com/chat/?url=irc://irc.perl.org/pdl
David
On Wed, Jan 2, 2013 at 9:14 AM, Craig DeForest
<[email protected] <mailto:[email protected]>> wrote:
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]
<mailto:[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 It also says it has been superseded by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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>
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