mod1$terms
## Sepal.Width ~ Petal.Width + log(Petal.Length) + Species
## attr(,"variables")
## list(Sepal.Width, Petal.Width, log(Petal.Length), Species)
## attr(,"factors")
##                   Petal.Width log(Petal.Length) Species
## Sepal.Width                 0                 0       0
## Petal.Width                 1                 0       0
## log(Petal.Length)           0                 1       0
## Species                     0                 0       1
## attr(,"term.labels")
## [1] "Petal.Width"       "log(Petal.Length)" "Species"          
## attr(,"order")
## [1] 1 1 1
## attr(,"intercept")
## [1] 1
## attr(,"response")
## [1] 1
## attr(,".Environment")
## <environment: R_GlobalEnv>
## attr(,"predvars")
## list(Sepal.Width, Petal.Width, log(Petal.Length), Species)
## attr(,"dataClasses")
##       Sepal.Width       Petal.Width log(Petal.Length)           Species 
##         "numeric"         "numeric"         "numeric"          "factor"