Hi, I fitted tree growth data with Chapman-Richards growth function using nls.
summary(fit.nls) Formula: Parameters: Estimate Std. Error t value Pr Signif. codes: 0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1 Residual standard error: 1.879 on 713 degrees of freedom Algorithm "port", convergence message: relative convergence (4) When I try to run the anova() function I get this: anova(fit.nls) Error in anova.nls(fit.nls) : anova is only defined for sequences of "nls" objects Could you tell me what the problem is? Thanks & Regards, Guru S
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