MATLAB: Applying a negative to the function to find the maximum

Question

hello to find the maximum point in a curve I must use the negative function however this creates errors. My function is f = @(x)p1*x^4 + p2*x^3 + p3*x^2 + p4*x + p5 where does the minus sign precede the f? Thanks.

Answer 1

Hi,

your minus should span the entire function, i.e.

f = @(x) -(p1*x^4 + p2*x^3 + p3*x^2 + p4*x + p5);

Titus