HP-71B: Min Max from Row or column in a matrix

[Erwin]

Hallo!

I posted my question in the wrong forum - thanks Dieter for the hint. So i try to do this in the correct forum again.
I'm looking for a function like in EXCEL to find the MAX, MIN and SUM from a row or column.
I tried to find an easy solution for to find the maximum, the minimum and the sum from rows and columns of a matrix on my HP71b.
There is no build in task in the MAT function and no function in the JPC-ROM too. So the only solution would be to read and compare each cell out of a matrix in BASIC.

Do somebody have a hint for an easy way to do this in Basic or exist there a LEX-function or can help me to solve this problem?

would be great - best regards
Erwin