Hi,
I've just released a new version of PDL-Dims, mainly fixing a few
things. Nowwhile actually using the module,I find the way thingswork a
little awkwardbut I don't knowa solution.
Let me explain:
I have a function like that, nothing fancy.
sub { $a*cos($t*$f)*exp(-$t*$r2) }
At compile time, however, I don't know what shape $a, $t2, $f haveor if
they are even PDLs. I'm a lazy guy and don't like keeping track of
dimensions, so I use PDL::Dims.
That winds upto wrapping each and every operation by nop / ncop to do
thedimensions magic:
Let's say:
use PDL::Dims
$a=pdl[1,2,3];
$r2=20;
$t=sequence 10;
$f=.5;
initdim $t,'t';
initdim $a,'amplitude';
sub { ncop ($a, ncop ( nop ( ncop ($f,$t,'mult',0), 'cos'),nop ( ncop (
ncop ( $t,1,'mult',0 ), $r2,'mult',0 ), 'exp' ), 'mult',0 ), 'mult',0 ); }
How could I hide some of that stuff within the module? I guess I could
overload explicitly the basic arithmetic operators(how?), at least, or
do you have abetter suggestions? Are there some hooks to inject code
before/after a methods call, for example?
Best
Ingo
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