groupStat | R Documentation |
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.
groupStat(f, x, xname = names(x), patterns)
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 |
patterns |
A character vector of regular expressions that define the groups. |
A data frame or matrix containing the summary statistics for each group.
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