why is this code not giving the output?

Question

bsd 2011-10-26

Hai,

I have typed this code;

A=@(x)[cos(x),-sin(x),0;sin(x),cos(x),0;0,0,1]; B=@(x)(A*[10;20;30])

After the above step, matrix B is not displayed as a function of x. Why is it so? Are the two matrices getting multiplied or not?

I need the resultant matrix as a function of x, because I need to do integration for each term in the resultant matrix.

Here the matrix [10;20;30] need not be so, they can be any constant values.

Looking for your reply.

BSD

Answer 1

Fangjun Jiang 2011-10-26

A is an anonymous function. You need to modify your B.

A=@(x)[cos(x),-sin(x),0;sin(x),cos(x),0;0,0,1];
A(pi/2)
B=@(x)(A(x)*[10;20;30]);
B(pi/2)