expfit
Exponential least-squares curve fit function.
Syntax
expfit(indep_vec, dep_vec [1])
Argument
- indep_vec
- The independent vector of the curve to fit.
- dep_vec
- The dependent vector of the curve to fit.
- [1]
- If this optional parameter is included, the polynomial coefficients are returned instead of the vectors.
Example
Curve Math Vectors | Result |
---|---|
x = c1.x
|
Given c1, an exponential function fitting the curve is created. |
Comments
The expfit function returns an exponential least squares fit solution. indep_vec and dep_vec must have the same number of elements.
The result is the exponential function, y = aebx, which best fits the original curve as determined by least squares criteria. expfit also returns the exponential coefficients and the mean deviation.
All values in dep_vec must be strictly positive (in other words, greater than and NOT equal to zero).