[R-pkg-devel] Errors in my package

[Joris Meys]

On Thu, May 24, 2018 at 10:11 PM, Steven Spiriti <puzzlesteven using gmail.com>
wrote:

>
> > x <- 0:30/30
> > truey <- x*sin(10*x)
> > set.seed(10556)
> > y <- truey + rnorm(31, 0, 0.2)
> > xy.freekt <- freelsgen(x, y, degree = 2, numknot = 2, 555)
> > coef(xy.freekt)
> Error: $ operator not defined for this S4 class
> Execution halted
>

The error and the code of the function tell me there is a problem with
dispatching. You treat xy.freekt as an S4 class and R thinks so too. The
coef generic is S3. The default method for this generic extracts
object$coefficients, and that can't work on an S4 class. This would explain
the error you see: instead of using the appropriate method, the dispatching
apparently uses the default S3 method.

Can you link us to a github repo or so where we can see the code? I suspect
either a problem with the NAMESPACE or with the class definitions. Are you
sure freelsgen returns the class you expect it to return?

Cheers
Joris

-- 
Joris Meys
Statistical consultant

Department of Data Analysis and Mathematical Modelling
Ghent University
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