I've been using MGET to predict sediment size from GAMs. One of the independent variables is 'region' which I put into the GAM as a factor. 

My model is : MEAN ~ s(bathy)+s(currentspeed)+s(bpi)+factor(region)

The issue is that when I look at the prediction there are artifacts from the region variable i.e. there are visible lines between areas defined by the factor. 

Have you come across this before? If you have any suggestions I would really appreciate it. 

Thanks,

Rowenna

• [mget-help] artifacts when predicting GAM from rasters due to categorical variable? — Rowenna Gryba
  • RE: [mget-help] artifacts when predicting GAM from rasters due to categorical variable? — Daniel Dunn