How to call $PDL::BIGPDL=1?

Blue_eyed_son has asked for the wisdom of the Perl Monks concerning the following question:

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Re: How to call $PDL::BIGPDL=1? by JadeNB (Chaplain) on Sep 13, 2008 at 20:57 UTC
You say 'writing `$PDL::BIGPDL=1` doesn't do it'. What is the code? What error message do you get? Could it be that you typed, say, `$PDL::BigPDL=1` (not all-caps) instead? Note that `$name->$PDL::BIGPDL` tries to call the method whose name is stored in `$PDL::BIGPDL` on the object `$name`, which is almost certainly not what you want; and `$name = $PDL::BIGPDL = 1` will indeed set `$PDL::BIGPDL` to `1`, but will then put that same `1` into `$name`, which is probably not what you want. Qualifying `$BIGPDL` with `PDL::` already specifies the package; you don't need the help of an object to do this.	[reply] [d/l] [select]
Re^2: How to call $PDL::BIGPDL=1? by Blue_eyed_son (Sexton) on Sep 14, 2008 at 00:17 UTC
Got it: when I try this: `$name=$PDL::BIGPDL=zeroes($large_number1,$large_number2);` [download] It works. Thank you.	[reply] [d/l]
Re^3: How to call $PDL::BIGPDL=1? [use PDL::IO::FastRaw to memory-map instead] by etj (Priest) on Aug 20, 2021 at 04:29 UTC
For posterity; the minimum you need to do is: `$PDL::BIGPDL=1; # true value $name=zeroes($large_number1,$large_number2); # now size not checked` [download] An even better solution to the problem is to use PDL::IO::FastRaw and memory-map a disk-file, which doesn't allocate any RAM at all: `use PDL::IO::FastRaw; $name=mapfraw( 'fname', {Creat => 1, Dims => [$large_number1,$large_number2]} );` [download]	[reply] [d/l] [select]