This function performs ANOVA tests between fitted calibration models.
"anova"(object, ...) "anova"(object, ...)
For 'lmcal' models this function performs four tests: two ANOVAs between linear and quadratic model, without and with log-log transform (first is mentioned in literature as Mandel's fitting test), and two ANOVAs comparing four polynomial models, weighted and unweighted.
For 'nlscal' models two ANOVAs are performed - between asymptotic models without and with intercept term, and between three and four parameter logistic models.
data(nitrate) attach(nitrate) fit = lmcal(conc,area) anova(fit) fit2 = nlscal(conc,area) anova(fit2)