script-generator: R: restrict HRF file

[kwenzig]

Subject of the issue

Within the R-script HRF should be restricted to the same variables as in Stata.

Expected behaviour

R

### LOAD [H|P]HRF ###
hrf <- read.dta(file.path(path_in, "phrf.dta"), convert.factors=F)
hrf <- hrf[,c("hhnr","persnr","prgroup","yphrf")]

Actual behaviour

Stata

* * * HRF * * *
use /// 
hhnr persnr prgroup ///
yphrf ///
using "${MY_PATH_IN}phrf.dta"
save "${MY_PATH_OUT}hrf.dta", replace 
clear

R

### LOAD [H|P]HRF ###
hrf <- read.dta(file.path(path_in, "phrf.dta"), convert.factors=F)