inline_text.tbl_summary() update with pattern argument

[ddsjoberg]

For a typical project, I need a Table 1 describing the patient population where I'll report, for example, the median IQR for age. Currently, the inline_text.tbl_summary() function can only print exactly what appears in the table, e.g. 4.5 (3.0, 6.7). But I often want to print just the median, or for categorical I"ll only want to print n or the percent.

I would like to introduce a pattern argument where we can grab any statistic from the table. This will require a large update to tbl_summary(). One possible solution is to return a column in the meta_data tibble that is a tibble containing the individual statistics.

Here's an example of the meta_data table and a print of the last column containing the statistics. (Perhaps in the update process we add in the ability to not only round to integer values, but use a rounding function?)

# A tibble: 2 x 6
  variable class   summary_type var_label stat_display        df_stats     
  <chr>    <chr>   <chr>        <chr>     <chr>               <list>       
1 age      numeric continuous   Age, yrs  {median} ({p25}, {~ <tibble [1 x~
2 grade    factor  categorical  Grade     {n} ({p}%)          <tibble [3 x~
[[1]]
# A tibble: 1 x 3
  median   p25   p75
   <dbl> <dbl> <dbl>
1   46.3  37.2  56.8

[[2]]
# A tibble: 3 x 3
      n     N     p
  <dbl> <dbl> <dbl>
1    67   200 0.335
2    58   200 0.290
3    75   200 0.375

^{Created on 2019-10-20 by the reprex package (v0.3.0)}