Taking elements of matrix into coefficient of a function

I have a 1x3 matrix. I want to make each elements of the matrix into coefficients of a quadratic function.

Say the matrix is

 A = [c1 c2 c3]

I want to make a function, for example

q = c1+c2.*x+c3.*x.^2

with x for example:

x = 1:1e-2:2

with c1, c2, and c3 are all the elements of the matrix A.

When I make a function of it, it says the dimensions are incorrect. I get why it's incorrect, I just want to know how to do it.

Answer 1

[Star Strider]

Try this —

A = [randi(9) randi(9) randi(9)]

A = 1×3

1 9 2

x = 1:1e-2:2;
y = polyval(flip(A), x);                        

figure
plot(x, y)
grid

The polyval function evaluates ‘A’ as ‘A(3)*x.^2 + A(2)*x + A(1)’ so it is necessary to flip it in the polyval call.

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