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Question: Substituting Variables into Matricies

Question:Substituting Variables into Matricies

eball 15 Maple
matrix vector substitution subs
March 25 2011
2

I am trying to make substitutions into a matrix using the subs() command, but it does not work.

for example

with(linalg):
A:= matrix([[a,b,c],[d,e,f]]):
B:=subs[inplace](a=1/L,b=-1/L,c=1,d=-1/L,e=L,f=1,A);

                                                                         B:=A

 

It will not make any substitutions into a matrix or vector and i cant figure out why.  I tried using [inplace] which is

" The inplace option only applies when substituting into an rtable (such as Array, Matrix, or Vector) with no indexing function. When inplace is specified, the input rtable is updated in-place.  The result is the updated original expr rtable, rather than a copy."

 

Any help is appreciated

 

Thanks

                          
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