spread.grouped function

Spreading grouped data over intervals

Assuming that counts represents the frequencies of observations falling into intervals identified by breaks, the function returns a vector of values obtained by uniformly spreading each group of data over the pertaining interval.

spread.grouped(breaks, counts, shift = "centre")

Arguments

• breaks: A numeric vector of strictly increasing finite values which identify a set of contiguous intervals on the real line.
• counts: A vector of non-negative integers representing the number of observations falling in the intervals specified by breaks; it is then required that length(counts)+1=length(breaks).
• shift: a character string which regulates the positioning of the constructed points within a given interval, with possible values "left", "center" (default choice) and "right", possibly abbreviated.

Returns

A numeric vector of length sum(counts) of values within range(breaks).

Author(s)

Adelchi Azzalini

See Also

fitdistr.grouped

Examples

breaks <- c(10, 12, 15, 20)
counts <- c(3, 2, 4)
spread.grouped(breaks, counts)
spread.grouped(breaks, counts, "l")