Generate a dataframe with `t`, `pos` and `tot` columns from `t` and `seropositive` vectors.
Examples
df <- hcv_be_2006
hcv_df <- transform_data(df, stratum_col="dur", status_col="seropositive")
hcv_df
#> # A tibble: 116 × 3
#> age pos tot
#> <dbl> <int> <int>
#> 1 0.1 0 1
#> 2 0.3 0 1
#> 3 0.4 0 3
#> 4 0.5 0 1
#> 5 0.7 2 5
#> 6 0.8 3 4
#> 7 0.9 3 4
#> 8 1 5 7
#> 9 1.1 1 2
#> 10 1.2 3 4
#> # ℹ 106 more rows