Basic operations with matrix in a program ...

[victorvbc]

These are CAS commands, you can execute them in PPL three ways, as far as I know.

1. Use a "CAS." prefix. Ex.: CAS.covariance();

2. Execute the comand as a string with CAS("");

3. Make your program a CAS function by checking the box when creating it, this will automatically add #cas and #end to it.