rgtsummary

Modify cells in tbl_summary table by dividing with constant

I have a table which has n and percentages in cells. I would like to divide or multiply each n by a constant, ideally while creating the table.

library(gtsummary)
df <- data.frame(
  a=sample(1:4, 10, replace=T),
  b=sample(1:4, 10, replace=T),
  c=sample(1:4, 10, replace=T)
)
df %>%
  tbl_summary()

enter image description here

For example, instead of the first entry being 5 (50%), I would like to divide each n by 10, leading to .5 (50%).

I've tried 1) modifying the table's data with regular expressions which seems quite involved, and 2) playing unsuccessfully with the statistic term in tbl_summary. I would appreciate any suggestions.

Solution

  • You were concerned about the complexity of your regex approach, but you can do fairly easily with:

    ts = tbl_summary(df)


ts$table_body <- ts$table_body %>% 
  mutate(stat_0 = stringr::str_replace(stat_0,"^\\d+",\(x) as.numeric(x)/10))

    Then ts renders as:

    enter image description here