Re: [R] any measure for curvature

You mean non-linearity? You can use a lack of fit test by using: anova(lm(y ~ x+factor(x), data)) The F-value of factor(x) is the lack of fit test, and when lineair, the p value should be <0.05 when using 0.95% significance. Bart Wensui Liu wrote: > > in statistics, is there a measure for curv

[R] any measure for curvature

in statistics, is there a measure for curvature? how to detect and quantify the curvature between 2 variales instead of using visualization? thank you so much! __ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do re