findEqualGreater: Find values in sorted vectors
In xcms: LC-MS and GC-MS Data Analysis

Description Usage Arguments Details Value Author(s)

Find values in sorted vectors.

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

`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`

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.

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

Colin A. Smith, csmith@scripps.edu

xcms documentation built on Nov. 8, 2020, 5:13 p.m.