Programming challenges: processing vectors and matrices

[John Keith]

The ROW and COL type commands tend to be slow, although some are worse than others. I find that lists are faster to work with overall than arrays, and more flexible as well. I really only use arrays when I need linear algebra functions like inverse , determinant, etc.

If you have ListExt, the following short program is faster than TRAN, even if you use AXL twice to convert between matrix and list:

Code:


\<< DUP LXIL SWAP SIZE LDIST
\>>