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Yes, thanks that's very useful Apart from checking the fit with nls() as you suggested, I've also used Prism, which gave the following results Equation 1 Best-fit values BOTTOM 10.96 TOP 106.4 LOGEC50 -5.897...
Hello Thanks a lot Marc, for the suggestion to explore the issue a bit more systematically So I did and the conclusion is that with the old drc 1.4-2, I get a SE=0.003, with the new...
Hello, We use drc to fit dose-response curves, recently we discovered that there are quite different standard error values returned for the same dataset depending on the drc-version / R-version that was used (not clear which factor is...
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