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Thanks Jim, It turns out that the problem was that all columns had been converted to factors.? Once I converted them back to numeric variables the code worked fine.? If anybody is wondering how, you can do this with the...
Dear all, I'm trying to replicate the panel function behaviour that Deepayan and others discuss here: https://stat.ethz.ch/pipermail/r-help/2007-April/130779.html and Oscar Lamigueiro refers to here and provides sample code for: http...
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