On Sat, Jun 26, 2010 at 3:39 PM, Chris Marshall <[email protected]> wrote:
> On 6/26/2010 1:55 PM, P Kishor wrote:
>>
>> a few days back I had asked for help creating an [x,y,z] dims piddle
>> where every element was a random integer between 0 and 255. A couple
>> of suggestions set me off to learn dummy(), and I also learned the
>> correct use of random() (thanks, Daniel and Chris). Today, I figured
>> out a way to make any dimension piddle filled with random integers
>> between any two integers<max> and<min>.
>>
>> $a = (( (zeroes(<dim> [,<dim> ..] ))->random * (<max> -<min> + 1
>> )) +<min> )->floor
>>
>> The thing is, the above works whether I use zeroes or ones, which, I
>> am guessing is because internally PDL::new_from_specification is being
>> used to create a template for the piddle.
>
> It will also work if you leave out the ones or zeros/zeroes and
> put the type and dimension arguments in random:
>
> PDL> $a = (random(5,5,3)*(1000-500+1)+500)->floor
very nice, thanks! That said, I kinda like method calls on objects. I
like $p->random more than random(), and for that reason, I have warmed
to $p->slice more than the NiceSlice syntax. zeroes gives me a piddle
to work on.
On a related note... if I have my own function
sub foo {
my ($a, $b, $c, $piddle) = @_;
do something to every element in $piddle based on $a, $b, $c
}
I want to invoke it as a method call on my piddle $p, like so
$p->foo($a, $b, $c)
How do I construct that?
>
> PDL> p $a
>
> [
> [
> [578 968 547 500 739]
> [773 857 745 598 550]
> [896 829 979 975 846]
> [625 693 944 817 508]
> [569 620 696 817 877]
> ]
> [
> [654 522 908 822 835]
> [610 866 526 507 796]
> [521 518 965 626 700]
> [528 995 722 632 736]
> [642 794 980 776 691]
> ]
> [
> [987 859 706 724 947]
> [985 908 741 886 977]
> [976 612 615 887 514]
> [720 689 984 507 920]
> [867 774 674 836 531]
> ]
> ]
>
> --Chris
>
--
Puneet Kishor
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