[R] spline.correlog (ncf package) - Error message: tol must be strictly positive and finite

[Diego Pavon]

Dear all

I am trying to run the spline.correlogram in package ncf to check for
spatial autocorrelation in the residuals of my models, but I get an error
message:

Error in smooth.spline(u, v, df = df) :
  'tol' must be strictly positive and finite


I have googled the error and I got to the website
http://www.inside-r.org/packages/cran/ncf/docs/spline.correlog

However, I could not figure out how to solve this error. My data consists
in a time series (29 years) of counts in 92 sites in Finland. I have run
the model I wanted and then I want to use the residuals to check for
spatial autocorrelation. Hence, my code looks like:

DucksCorr <- spline.correlog(x=Ducks2[, "Lon"],
                               y=Ducks2[, "Lat"],
                               z=Ducks2[, "Resid"],
                               xmax=FALSE)

When I run this code, I get the error message. I have removed NAs (although
this can deal with it) and coordinates are correct and also the residuals.
Do you have an idea or suggestions on how to deal with this error message?

Thank you very much for your time and help!

Best

Diego

-- 
*Diego Pavón Jordán*

*Finnish Museum of Natural History*
*PO BOX 17 *

*Helsinki. Finland*



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