mz-methods: Manipulate mass-to-charge-ratio values

In Cardinal: A mass spectrometry imaging toolbox for statistical analysis

Description

This is a generic function for getting or setting 'mz' for an object with associated m/z values, or for generating a sequence of appropriate m/z values for such an object.

Usage

## S4 method for signature 'missing'
mz(from, to, by, resolution = 200, units = c("ppm", "mz"), ...)

mz(object, ...)

mz(object, ...) <- value

Arguments

object	An object with m/z values.
value	The value to set the m/z values.
from, to	The starting amd (maximal) end values of the sequence of m/z values.
by	The (approximate) interval between m/z values. For units="ppm", rather than an exact step size, this actually corresponds to a binwidth, where each element of the sequence is considered the center of a bin.
resolution	Another way to specify the interval between m/z values. For units="mz", this is the same as by. For units="ppm", this is the half-binwdith.
units	The units for by and resolution. Either parts-per-million or absolute m/z increments.
...	Additional arguments (ignored).

Author(s)

Kylie A. Bemis

See Also

MassDataFrame

Examples

mz(from=200, to=220, by=300, units="ppm")

Cardinal documentation built on Nov. 8, 2020, 11:10 p.m.