Del_spe_col.Rd
Helper function to replace the first parenthesis by a "_" and erase the second. For exemple, lai(n) becomes lai_n.
Del_spe_col(x)
A data.frame
A data.frame with R-ready column names.
if (FALSE) { library(sticRs) ; library(data.table) a= data.table(`lai(n)`= c(1:8)) Del_spe_col(a) }