Section: Optimization and Curve Fitting
polyval routine has the following syntax
y = polyval(p,x)
where p is a vector of polynomial coefficients,
in decreasing degree (as generated by polyfit, for example).
If x is a matrix, the polynomial is evaluated in the matrix
sense (in which case x must be square).
then the calculation is performed as
x^3 generated using polyval
--> p = [1 0 0 0] p = <int32> - size: [1 4] Columns 1 to 4 1 0 0 0 --> x = linspace(-1,1); --> y = polyval(p,x); --> plot(x,y,'r-')
Here is the resulting plot