Programming challenges: processing vectors and matrices

[John Keith]

(12-27-2022 10:39 PM)pier4r Wrote:  Is there a way, built in or with additional libraries, to have the equivalent of POS (and also MPOS from ListExt) for arrays?

Not unless David manages to add that functionality to ListExt.

Seriously though, AXL n MPOS is quite fast and efficient. I tend to use lists rather than arrays unless I need linear algebra operations (matrix inversion, determinants, etc.).

There is one issue to watch out for when using AXL however. AXL always converts a list into a type 29 (symbolic) array. The command AXM will convert a type 29 array into an approximate (type 3 or 4) array but it is slow. If you need to convert a list of reals into a type 3 array, it may be better just to use OBJ-> and ->ARRY.