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.../gnrlex/VonBertalanffy/VonBertalanffy.pdf. Specifically the section on VBGM Comparisons between groups. ? This code is pretty cut and dry. I am able to run it perfectly with the "fake" data that is provided. But when I run it with my own data I get stuck with this line: fitGen <- nls(vbGen,data=LMB,start=svGen) ? I get this error code: Error in numericDeriv(form[[3L]], names(ind), env) : Missing value or an infinity produced when evaluating the model. ? Does anyone know how to fix it? I have no missing values and do not know how to fix the infinity produced. Here is my data set: s...

...ints with this species, and it is ordered exactly the same as the other species I have been working with.   The two errors I get are for these specific lines of code: This error I actually got with all the data sets but its just assumption checking so I did this manually. > fitGen <- nls(vbGen,data=BLG,start=svGen) Error in nlsModel(formula, mf, start, wts) :   singular gradient matrix at initial parameter estimates and This code is only not working with this data set. > fitK <- nls(vbK,data=BLG,start=svK) Error in numericDeriv(form[[3L]], names(ind), env) :   Missing value...