R package: Generally Useful Functions
This package can be thought of as an extension of ‘base R’, in the sense that it provides simple, “base R”-like functionality. In short (and see details in documentation/help):
%notin% which is the inverse of and complements %in%
right() which gives a specifiable number of characters from the ‘right’ side of a character string
left() which gives a specifiable number of characters from the ‘left’ side of a character string
se() which gives the standard error of a numerical vector
round_something() which provides a numerical rounding of a vector, matrix or dataframe to a specifiable decimal place; the dataframe can be of mixed variable types, as only numerical columns are rounded
count() which counts the number of elements per unique element in a vector, matrix or combination of vectors (dataframe columns); this function can ‘pivot’, i.e., make vertical rows horizontal
aggro() which can make aggregates, somewhat like the already existing aggregate(), but then also with the option of ‘pivoting’