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+--- Thread: Comparing Matrices (in CAS Mode?) (/thread-7153.html)
Comparing Matrices (in CAS Mode?) - Eddie W. Shore - 11-02-2016 03:48 AM
I am trying create a matrix program in CAS mode, isorthogonal, to test whether a matrix is orthogonal:
#cas
isorthogonal(m):=
BEGIN
LOCAL s,n,p;
s:=SIZE(m);
s:=s(1);
n:=IDENMAT(s);
p:=simplify(TRN(m)*m));
IF n==p THEN
RETURN 1;
ELSE
RETURN 0;
END;
END;
#end
Testing [[2,0][0,2]] and [[2*x,0][0,2*x]] I get the error
"For: Unable to check test Error: Bad Argument Value"
Are we not able to compare matrices in CAS mode? Thanks,
Eddie
RE: Comparing Matrices (in CAS Mode?) - roadrunner - 11-02-2016 11:33 AM
You have an extra ")" in this line:
p:=simplify(TRN(m)*m));
I changed it to:
p:=simplify(TRN(m)*m);
and your program seems to work correctly for me.
-road