matrix how to call just a column like A( : , 2 )

[Tim Wessman]

Searching the built in help on the calculator would have found it quite quickly i think.

Search "column" in the on-calc help and you will go through all places columns are mentioned, and come across "col" which reads:

"Syntax:
col(Matrix, Integer) or
col(Matrix, Interval)

Returns the column n or the sequence of the columns n1 … n2 of the matrix A.


Example:
col([[1,2,3],[4,5,6],[7,8,9]],2) → [2,5,8]
"

You could have also opened the full catalog that lists every command in the system, started typing "column" and it would have dropped you into those commands. A tap on help would have brought up the info on the various commands there till you found it.

I understand your frustration, but I do not know what could be done different here. Not sure how to further improve "i don't know what the name of something is nor where to find it" problem though. Where would you have placed it?