I am trying to get the length of the following formula:
myformula <- ~ (1 | Variable1) (1|Sex) Age Cells Glucose
But for some reason, R
doesn't recognize the real number of elements (which is 5)
str(myformula)
Class 'formula' language ~(1 | Variable1) (1 | Sex) Age Neutrophils Monocytes
..- attr(*, ".Environment")=<environment: R_GlobalEnv>
length(myformula)
[1] 2
(Note: I have variables like this (1|Variable) because I am working with the Variance Partition package (and categorical variables must be written in that format).
Does anyone know how to get the real length of a formula in R
?
Thanks very much in advance
Regards
CodePudding user response:
We may use all.vars
to get the variables in the formula and then apply the length
length(all.vars(myformula))
[1] 5