od_create_diag: Create a new variable based on pattern.
In injuryepi/overdoser: Overdose data analysis

Description Usage Arguments Value Examples

Create a new variable based on pattern in the argument expr

1	od_create_diag(data, expr, colvec, ignore.case = T, perl = T)

`ignore.case`	logical
`perl`	logical
`data:`	input data
`expr:`	regular expression describing the pattern of interest
`colvec:`	indices of variables of interest

new variable matching the pattern described in the regular expression

heroin_icd9cm_regex_ <- '^96501|^E8500'
library(tidyverse)
\thosp_set %>%
\tfilter(year == 2015) %>%
\tod_create_diag(expr = heroin_icd9cm_regex_,
\tcolvec = c(1:5)) %>% sample_n(10)