Craig, David,
Thanks for your helpful explanations and for the work invested in this nice,
useful and powerful software!
Regards,
Luis
David Mertens <[email protected]> wrote:
>Luis -
>
>I remember putting a lot of effort a few years ago into getting cat to
>do
>the right thing for a number of scenarios, and to report the right
>error
>when things failed. Over the course of this, I realized that you can
>use
>pdl() to concatenate stuff in a way that more forgiving and which
>almost
>always Does What You Mean. Because it is more relaxed, I recommend
>using it
>instead of using cat unless you explicitly want the dimension checks
>that
>cat is supposed to provide.
>
>That said, ironing out these issues with cat is a Good Thing. :-)
>
>David
>
>
>On Sat, Mar 9, 2013 at 11:51 AM, Craig DeForest
><[email protected]>wrote:
>
>> I would have to check, since I haven't used the complex code in
>donkey's
>> years. The current git should give the same answer as glue. The
>> constructor itself should do the Right thing - e.g.
>pdl(pdl(1),pdl(2*i)) -
>> since it zero-pads short elements in its arg list.
>>
>> (Mobile)
>>
>>
>> On Mar 9, 2013, at 10:38 AM, Luis Mochan <[email protected]> wrote:
>>
>> >> Thanks for the report -- fixed in git.
>> > Thanks for fixing it so promptly!
>> >
>> > I haven't tried the new git version, but I found a related bug and
>a
>> surprise:
>> > pdl> use PDL::Complex
>> > pdl> p cat(pdl(1),pdl(2*i))
>> > [1 2]
>> > I guess this is the same bug as before.
>> > pdl> p cat(pdl(2*i), pdl(1))
>> > [0 +2i 1 +1i]
>> > This may be suprising, as it might be expected that the real number
>> > pdl(1) gets complexified to 1+0*i, but actually, the threading
>machine
>> adds a
>> > dummy dimension that converts pdl(1) to the vector [1,1] which is
>> > interpreted as 1+1i. The relation between complex numbers and size
>2
>> > vectors has to be handled with care. What would the result of
>> > cat(pdl(1),pdl(2*i)) using the current git version? [1+1i,0+2i] or
>> > [1+0i,0,2i]?
>> >
>> > Best regards,
>> > Luis
>> >
>> > _______________________________________________
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>> > [email protected]
>> > http://mailman.jach.hawaii.edu/mailman/listinfo/perldl
>> >
>>
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>
>
>
>--
> "Debugging is twice as hard as writing the code in the first place.
> Therefore, if you write the code as cleverly as possible, you are,
> by definition, not smart enough to debug it." -- Brian Kernighan
--
>From my phone. WLM
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