cutoff: A function to calculate thresholds of cumulative sums in a vector.
Description
This function tells us how far we have to
go before reaching a cutoff in a variable
by sorting the vector, then finding how far
to go. Note that the cutoff is expressed in
percentage terms (fixed cumulative sum)
Usage
cutoff(x, cutoff, na.rm = TRUE)
Value
An integer for the minimum number of elements necessary to reach cutoff
Arguments
x
a numeric vector, missing values are allowed
cutoff
a user defined numeric value to stop the cutoff specified as
a proportion 0 to 1
na.rm
logical, should missing values be excluded?
Author
Jared E. Knowles
Details
Calculates the distance through a numeric vector before a certain
proportion of the sum is reached by sorting the vector and calculating the
cumulative proportion of each element