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+--- Thread: Matrix range (/thread-4100.html)
Matrix range - salvomic - 06-06-2015 06:14 PM
I didn't know, but inputting M1(1..2) Prime return matrix M1 with the first 2 rows...
There is a trick to get also the first two columns like that?
Another thing:
mat:= delcols(m, (r+1) .. c);
doesn't run in a program (in Home it complains that there are two decimal dots...; in CAS gives error also): any other simple command to extract a range from a matrix?
EDIT: found this other thing:
SUB(m, {1,1}, {r,r});
Salvo
RE: Matrix range - Joe Horn - 06-07-2015 03:29 AM
(06-06-2015 06:14 PM)salvomic Wrote: I didn't know, but inputting M1(1..2) Prime return matrix M1 with the first 2 rows...
There is a trick to get also the first two columns like that?
Not a "trick", but col(M1,1..2) in CAS returns the first two columns of M1.
RE: Matrix range - salvomic - 06-07-2015 07:21 AM
(06-07-2015 03:29 AM)Joe Horn Wrote: Not a "trick", but col(M1,1..2) in CAS returns the first two columns of M1.
oh, thanks!
it works
Salvo