mgcv access to estimate.gam function

Question

I am using the R library mgcv

The gam function returns an object with the edf1 value

> g = gam(y~s(x, k = 10, bs = "cr"), data = data, scale = 1)
> g$edf1
(Intercept)      s(x).1      s(x).2      s(x).3      s(x).4      s(x).5      s(x).6      s(x).7      s(x).8 
  1.0000000   0.2417857   0.4744928   0.4667241   0.4347516   0.4107624   0.4136064   0.4288544   0.5315970 
     s(x).9 
  0.5941861 
> 

I need to understand how this value is computed and so I am reading the code of the gam() function.

Inside gam() the result is obtained by another function

object <- estimate.gam(G, method, optimizer, control, in.out, 
                         scale, gamma, ...)

The problem is that I can not access to the estimate.gam() function

> estimate.gam
Error: object 'estimate.gam' not found
> 

How can I solve this?

Answer 1

You can download the source code and inspect the files. The function estimate.gam is stored in the R subdirectory in the file mgcv.r .