groupStat: Perform Summary Analysis by Group Using Regular Expressions
Description
This function applies a specified function to each group defined by a regular expression
pattern applied to the names of a data object. It is useful for summarizing data when
groups are defined by a pattern in the names rather than a specific column or index.
Usage
groupStat(f, x, xname = colnames(x), patterns)
Value
A list containing the summary statistics for each group.
Arguments
f
A function that takes a single argument and returns a summary of the data.
x
A data frame or matrix containing the data to be summarized.
xname
A character vector containing the names of the variables in x.
patterns
A list of regular expressions that define the groups.