list values in symbolic function, a simplification problem
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Dear all,
I have a Matlab function fct.m that returns a symbolic function. Inside the fct.m file, I create a vector, say
A = [1 2 3 4];
Then I declare
syms x y;
f = sym('A(1)+A(2)*x+A(3)*x+A(4)*x*y');
and I return f as the output of fct.m .
The problem I have now is that I obtain in the command window
f =
A(1)+A(2)*x+A(3)*x+A(4)*x*y
However, I would like to know what the A(1), ..., A(4) are and subsequently use Matlab to simplify f. However, Matlab does not seem to understand that A(1), ..., A(4) are actual numbers. As an example I would like to see
f =
1 + 2*x + 3*x + 5*x*y
and get f = 1 + 5*x*(1+y) after simplification.
I would appreciate any help with this. Obviously the A(i)'s are not given by me, but rather computed with another function call.
Thanks in advance,
dodo
采纳的回答
Azzi Abdelmalek
2013-1-27
编辑：Azzi Abdelmalek
2013-1-27
Why to not write it like:
A = [1 2 3 4];
syms x y;
f = A(1)+A(2)*x+A(3)*x+A(4)*x*y
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2013-1-27
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