Matrix

[dbbotkin]

(08-07-2014 07:04 AM)parisse Wrote:  Inside CAS:
m:=[[44,48,82,48,55],[-65,-20,72,-86,-16],[77,-46,-28,-28,23],[-26,-46,-87,88,6],[-16,14,69,71,-78],[-74,81,-27,-87,81]];
sum(m);
You can use lowercase one letter names for any kind of variable in CAS.
Also * does dot product inside CAS

Entering the matrix above was (for me) not intuitive: I tried using the '[]' key without success to enter the '[[44,48 . . .],[ . .'.

The way that worked for me was 'm:=[44,48,. . .],[-65,-20, . . . etc.' and then 'Enter' the put the [[...]] matrix on the stack. Whew!

The 'sum()' function worked as stated.

I got the same result for 'sum(m)' with the data in a 6x5 matrix.

Very nice!