PDL is my bread and butter scientific computing language. I use it for image processing, experiment control, simulation interface, curve fitting, data manipulation, and just about anything else a general purpose scientific language is useful for. It is very nice to have access to all of CPAN within my scientific code, and the Inline tools are extraordinarily useful for coding up hot-spots in C or the vector metalanguage PP, right there in my scripts.
bad speed :(
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