Learn R Programming
xcms (version 1.48.0)

findEqualGreater: Find values in sorted vectors

Description

Find values in sorted vectors.

Usage

findEqualGreater(x, value)
findEqualLess(x, value)
findEqualGreaterM(x, values)
findRange(x, values, NAOK = FALSE)

Arguments

x
numeric vector sorted in increasing order
value
value to find in x
values
numeric values to find in x
NAOK
don't check for NA values in x

Value

An integer vector with the position(s) of the values(s).

Details

findEqualGreater finds the index of the first value in x that is equal or greater than value. findEqualLess does same except that it finds equal or less. findEqualGreaterM creates an index of a vector by finding specified values. findRange locates the start and stop indicides of a range of two x values.

The only things that save time at this point are findeEqualGreaterM (when the length of values approaches the lenght of x) and findRange (when NAOK is set to TRUE). They run in log(N) and N time, respectively.