applies statistical functions to all columns of a data frame
colStatistics(dataFrame, functions = c("sum", "mean", "min", "max", "number.na", "length"), na.rm = FALSE, functionColumn = FALSE)
dataFrame | data frame with numeric columns only |
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functions | vector of statistical functions to be applied on each column of dataFrame possible values: "sum", "mean", "min", "max", "number.na" (number of NA values), "length" (number of values) |
na.rm | if TRUE, NA values are removed before applying the statistical function(s) |
functionColumn | if TRUE, a column containing the function name is contained in the result data frame, otherwise the function names become the row names of the result data frame |