polyfit
p = polyfit(x, y, n=length(x)-1; xscale=1)Returns the coefficients for a polynomial p(x) of degree n that is the least-squares best fit for the data in y. The coefficients in p are in ascending powers, and the length of p is n+1.
The xscale parameter is useful when needing to get coeficients in different x units. For example when converting months or seconds into years.
Methods
# 4 methods for generic function "polyfit" from GMT:
[1] polyfit(x, y, n::Int64; xscale)
[2] polyfit(D::GMTdataset, n::Int64; xscale)
[3] polyfit(x, y; ...)
[4] polyfit(D::GMTdataset; ...)