r - Illustrate back transformed GLS with visreg() -
i have gls logarithmic transformed dependent variable. using visreg() visualization gives error code:
library(visreg); library(nlme) fit1 <- gls(log(ozone) ~ wind , data=na.omit(airquality)) visreg(fit1,"wind",trans=exp,ylab="ozone")
interestingly same works fine lm:
library(visreg); library(nlme) fit2 <- lm(log(ozone) ~ wind , data=na.omit(airquality)) visreg(fit2,"wind",trans=exp,ylab="ozone")
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