• June 5th 2006, 02:18 AM
I have a affine transformation:

f(x)=Ax+a where A is a 2x2 martix x and a are vectors

and I also have the function

g(x)=Bx + b where B is a 2x2 martix x is a vector

how would I go about combining them (ie g o f) as in forming a composite would it be like this :

Thanks in advance for any help.
• June 5th 2006, 02:53 AM
CaptainBlack
Quote:

Originally Posted by fair_lady0072002
I have a affine transformation:

f(x)=Ax+a where A is a 2x2 martix x and a are vectors

and I also have the function

g(x)=Bx + b where B is a 2x2 martix x is a vector

how would I go about combining them (ie g o f) as in forming a composite would it be like this :

Thanks in advance for any help.

$(g \circ f)(x)=g(f(x))=B(Ax+a)+b=BAx+Ba+b$

RonL