> I think I know what the issue is....I have some NA cells in the prediction grid. trying to do UK with NA cells may be the problem. IS there a way to exclude these or remove them? I think they are present due to transect spacing and the short range of the original OK done for the covariate...

Hi
I'm trying to run some universal kriging, and have not experienced this error before. I've removed duplicate data locations using the remove.duplicates command. The data set runs fine if the formula is set as ordinary kriging, but adding in a predictor (which is already known at each grid location)
gives

"lufactor.c", line 207: singular matrix in function m_inverse()
Error in predict.gstat

Any ideas?

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