search for: degday

Displaying 2 results from an estimated 2 matches for "degday".

Did you mean: degdays
2008 Sep 05
2
using nls to fit a curve to data
Hi, I am trying to fit a curve to data. My command line is: model10=nls(offspring~((A*c^k)/gamma(k))*((degdays-alpha)^(k-1))*exp(-c*(degdays-alpha)), start=list(A=30,k=2,c=.018,alpha=131)) I get the error message: Error in numericDeriv(form[[3]], names(ind), env) : Missing value or an infinity produced when evaluating the model In addition: Warning message: full precision was not achieved in ...
2008 Jul 02
0
question on dispersion parameter
Hi, I'm programming in R and below is a summary of a generalized linear model: ************************************************** *** Call: glm(formula = offspring ~ degdays, family = quasi(link = "log", variance = "mu"), data = fecundity) Deviance Residuals: Min 1Q Median 3Q Max -0.76674 -0.29117 -0.09664 0.15668 1.00800 Coefficients: Estimate Std. Error t value Pr(>|t|) (Intercept) -1.131351 0.030480 -37.12 <2e-16 *** degdays -0.008803 0....