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Bug in by() with dates as levels?
oren cheyette
·
Mar 4, 2009
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r-help
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nlsrob fails with puzzling error message on input accepted by nls
Oren Cheyette
·
Dec 22, 2008
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r-help
I have a nonlinear model estimation problem with ~50,000 data records and a simple 3 parameter model (logistic type - please don't tell me that there are linear methods for such a problem). I run nls with constraints once...
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