Filter Data with Log

Usage

log_filter(data, condition, ...)

# S3 method for data.frame
log_filter(data, condition, suffix = NULL, ...)

# S3 method for list
log_filter(
  data,
  condition,
  table,
  by = c("USUBJID", "STUDYID"),
  suffix = NULL,
  ...
)

Arguments

data: (data.frame) input data to subset, or named (list of data.frame).
condition: (call) of subset condition. Must evaluate as logical.
...: further arguments to be passed to or from other methods.
suffix: (string) optional argument describing the filter.
table: (string) table name.
by: (character) variable names shared by adsl and other datasets for filtering.

Value

a data.frame or list of data.frame filtered for the provided conditions.

Details

log_filter will filter the data/named list of data according to the condition. All the variables in condition must exist in the data (as variables) or in the parent frame(e.g., in global environment). For named list of data, if ADSL is available, log_filter will also try to subset all other datasets with USUBJID.

Examples

data <- iris
attr(data$Sepal.Length, "label") <- "cm"
log_filter(data, Sepal.Length >= 7)
#>    Sepal.Length Sepal.Width Petal.Length Petal.Width    Species
#> 1           7.0         3.2          4.7         1.4 versicolor
#> 2           7.1         3.0          5.9         2.1  virginica
#> 3           7.6         3.0          6.6         2.1  virginica
#> 4           7.3         2.9          6.3         1.8  virginica
#> 5           7.2         3.6          6.1         2.5  virginica
#> 6           7.7         3.8          6.7         2.2  virginica
#> 7           7.7         2.6          6.9         2.3  virginica
#> 8           7.7         2.8          6.7         2.0  virginica
#> 9           7.2         3.2          6.0         1.8  virginica
#> 10          7.2         3.0          5.8         1.6  virginica
#> 11          7.4         2.8          6.1         1.9  virginica
#> 12          7.9         3.8          6.4         2.0  virginica
#> 13          7.7         3.0          6.1         2.3  virginica

log_filter(list(iris = iris), Sepal.Length >= 7, "iris", character(0))
#> $iris
#>    Sepal.Length Sepal.Width Petal.Length Petal.Width    Species
#> 1           7.0         3.2          4.7         1.4 versicolor
#> 2           7.1         3.0          5.9         2.1  virginica
#> 3           7.6         3.0          6.6         2.1  virginica
#> 4           7.3         2.9          6.3         1.8  virginica
#> 5           7.2         3.6          6.1         2.5  virginica
#> 6           7.7         3.8          6.7         2.2  virginica
#> 7           7.7         2.6          6.9         2.3  virginica
#> 8           7.7         2.8          6.7         2.0  virginica
#> 9           7.2         3.2          6.0         1.8  virginica
#> 10          7.2         3.0          5.8         1.6  virginica
#> 11          7.4         2.8          6.1         1.9  virginica
#> 12          7.9         3.8          6.4         2.0  virginica
#> 13          7.7         3.0          6.1         2.3  virginica
#>