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Showing content from https://insightsengineering.github.io/rtables/latest-tag/articles/../reference/in_rows.html below:

Create multiple rows in analysis or summary functions — in_rows • rtables

Define the cells that get placed into multiple rows in afun.

Usage
in_rows(
  ...,
  .list = NULL,
  .names = NULL,
  .labels = NULL,
  .formats = NULL,
  .indent_mods = NULL,
  .cell_footnotes = list(NULL),
  .row_footnotes = list(NULL),
  .aligns = NULL,
  .format_na_strs = NULL,
  .stat_names = list(NULL)
)
Arguments
...

single row defining expressions.

.list

(list)
list cell content (usually rcells). The .list is concatenated to ....

.names

(character or NULL)
names of the returned list/structure.

.labels

(character or NULL)
labels for the defined rows.

.formats

(character or NULL)
formats for the values.

.indent_mods

(integer or NULL)
indent modifications for the defined rows.

(list)
referential footnote messages to be associated by name with cells.

(list)
referential footnotes messages to be associated by name with rows.

.aligns

(character or NULL)
alignments for the cells. Standard for NULL is "center". See formatters::list_valid_aligns() for currently supported alignments.

.format_na_strs

(character or NULL)
NA strings for the cells.

.stat_names

(list)
names for the statistics in the cells. It can be a vector of values. If list(NULL), statistic names are not specified and will appear as NA.

Value

A RowsVerticalSection object (or NULL). The details of this object should be considered an internal implementation detail.

Note

In post-processing, referential footnotes can also be added using row and column paths with fnotes_at_path<-.

Examples
in_rows(1, 2, 3, .names = c("a", "b", "c"))
#> RowsVerticalSection (in_rows) object print method:
#> ----------------------------
#>   row_name formatted_cell indent_mod row_label
#> 1        a              1          0         a
#> 2        b              2          0         b
#> 3        c              3          0         c
in_rows(1, 2, 3, .labels = c("a", "b", "c"))
#> RowsVerticalSection (in_rows) object print method:
#> ----------------------------
#>   row_name formatted_cell indent_mod row_label
#> 1        a              1          0         a
#> 2        b              2          0         b
#> 3        c              3          0         c
in_rows(1, 2, 3, .names = c("a", "b", "c"), .labels = c("AAA", "BBB", "CCC"))
#> RowsVerticalSection (in_rows) object print method:
#> ----------------------------
#>   row_name formatted_cell indent_mod row_label
#> 1        a              1          0       AAA
#> 2        b              2          0       BBB
#> 3        c              3          0       CCC
in_rows(
  .list = list(a = c(NA, NA)),
  .formats = "xx - xx",
  .format_na_strs = list(c("asda", "lkjklj"))
)
#> RowsVerticalSection (in_rows) object print method:
#> ----------------------------
#>   row_name formatted_cell indent_mod row_label
#> 1        a  asda - lkjklj          0         a
in_rows(.list = list(a = c(NA, NA)), .format_na_strs = c("asda", "lkjklj"))
#> RowsVerticalSection (in_rows) object print method:
#> ----------------------------
#>   row_name formatted_cell indent_mod row_label
#> 1        a           asda          0         a
#> 2        a         lkjklj          0      <NA>

in_rows(.list = list(a = 1, b = 2, c = 3))
#> RowsVerticalSection (in_rows) object print method:
#> ----------------------------
#>   row_name formatted_cell indent_mod row_label
#> 1        a              1          0         a
#> 2        b              2          0         b
#> 3        c              3          0         c
in_rows(1, 2, .list = list(3), .names = c("a", "b", "c"))
#> RowsVerticalSection (in_rows) object print method:
#> ----------------------------
#>   row_name formatted_cell indent_mod row_label
#> 1        a              1          0         a
#> 2        b              2          0         b
#> 3        c              3          0         c

lyt <- basic_table() %>%
  split_cols_by("ARM") %>%
  analyze("AGE", afun = function(x) {
    in_rows(
      "Mean (sd)" = rcell(c(mean(x), sd(x)), format = "xx.xx (xx.xx)"),
      "Range" = rcell(range(x), format = "xx.xx - xx.xx")
    )
  })

tbl <- build_table(lyt, ex_adsl)
tbl
#>               A: Drug X      B: Placebo     C: Combination
#> ——————————————————————————————————————————————————————————
#> Mean (sd)   33.77 (6.55)    35.43 (7.90)     35.43 (7.72) 
#> Range       21.00 - 50.00   21.00 - 62.00   20.00 - 69.00 


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