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Associate Multiple Variables with Rows

Source: R/colby_constructors.R
split_rows_by_multivar.Rd

When we need rows to reflect different variables rather than different levels of a single variable, we use split_rows_by_multivar.

Usage 

split_rows_by_multivar(
  lyt,
  vars,
  split_fun = NULL,
  split_label = "",
  varlabels = vars,
  format = NULL,
  na_str = NA_character_,
  nested = TRUE,
  child_labels = c("default", "visible", "hidden"),
  indent_mod = 0L,
  section_div = NA_character_,
  extra_args = list()
)

Arguments

lyt

layout object pre-data used for tabulation

vars

character vector. Multiple variable names.

split_fun

function/NULL. custom splitting function See custom_split_funs

split_label

string. Label string to be associated with the table generated by the split. Not to be confused with labels assigned to each child (which are based on the data and type of split during tabulation).

varlabels

character vector. Labels for vars

format

FormatSpec. Format associated with this split. Formats can be declared via strings ("xx.x") or function. In cases such as analyze calls, they can character vectors or lists of functions.

na_str

character(1). String that should be displayed when the value of x is missing. Defaults to "NA".

nested

boolean. Should this layout instruction be applied within the existing layout structure if possible (TRUE, the default) or as a new top-level element (`FALSE). Ignored if it would nest a split underneath analyses, which is not allowed.

child_labels

string. One of "default", "visible", "hidden". What should the display behavior be for the labels (i.e. label rows) of the children of this split. Defaults to "default" which flags the label row as visible only if the child has 0 content rows.

indent_mod

numeric. Modifier for the default indent position for the structure created by this function(subtable, content table, or row) and all of that structure's children. Defaults to 0, which corresponds to the unmodified default behavior.

section_div

character(1). String which should be repeated as a section divider after each group defined by this split instruction, or NA_character_ (the default) for no section divider.

extra_args

list. Extra arguments to be passed to the tabulation function. Element position in the list corresponds to the children of this split. Named elements in the child-specific lists are ignored if they do not match a formal argument of the tabulation function.

Value

A PreDataTableLayouts object suitable for passing to further layouting functions, and to build_table.

See also

split_rows_by() for typical row splitting, and split_cols_by_multivar() to perform the same type of split on a column basis.

Examples 

lyt <- basic_table() %>%
    split_cols_by("ARM") %>%
    split_rows_by_multivar(c("SEX", "STRATA1")) %>%
    summarize_row_groups() %>%
    analyze(c("AGE", "SEX"))

tbl <- build_table(lyt, DM)
tbl
#>                           A: Drug X      B: Placebo    C: Combination
#> —————————————————————————————————————————————————————————————————————
#>                                                                      
#>   SEX                    121 (100.0%)   106 (100.0%)    129 (100.0%) 
#>     AGE                                                              
#>       Mean                  34.91          33.02           34.57     
#>     SEX                                                              
#>       F                       70             56              61      
#>       M                       51             50              68      
#>       U                       0              0               0       
#>       UNDIFFERENTIATED        0              0               0       
#>   STRATA1                121 (100.0%)   106 (100.0%)    129 (100.0%) 
#>     AGE                                                              
#>       Mean                  34.91          33.02           34.57     
#>     SEX                                                              
#>       F                       70             56              61      
#>       M                       51             50              68      
#>       U                       0              0               0       
#>       UNDIFFERENTIATED        0              0               0