How do I search for a function?
Use the PerlDL shell (either pdl2 or perldl) on your computer. For example, use the help command to learn about xvals:
pdl> help xvals
If you don't know the exact name of the function, use the apropos command to do a fuzzy seach:
pdl> apropos xval mn_init The function mn_init() does the basic initialization of the fit. The first argument has to be a reference to the function to be minimized. xlinvals X axis values between endpoints (see xvals). xlogvals X axis values logarithmicly spaced between endpoints (see xvals). xvals Fills a piddle with X index values. Uses similar specifications to zeroes and new_from_specification. yvals Fills a piddle with Y index values. See the CAVEAT for xvals. zvals Fills a piddle with Z index values. See the CAVEAT for xvals.
The apropos command does a regex search for function names and descriptions.