ppc.predict.peaks {ppc}R Documentation

A function to find centroid peaks, in a list of individual peaks

Description

Takes centroid.fit (result of a call to make.centroids.list) and looks for these m peaks in peaklist, a list of length n returns ind - an m by n matrix of TRUE/FALSE values and ht, the matrix of corresponding peak heights. A peak is considered present if it is within user.parms$peak.gap units from the centroid.

Usage

ppc.predict.peaks(centroid.fit, data)

Arguments

centroid.fit Result of call to make.centroid.list
data List containing the mass spec peaks data

Value

ind indicator matrix of presence/absence of peak
ht matrix of heights. Note: peak is not present if ind=0, even if ht is >0

Author(s)

Balasubramanian Narasimhan and Rob Tibshirani

Examples

## for a complete worked example of this function in a PPC analysis  see
##  http://www-stat.stanford.edu/~tibs/PPC/Rdist/Rscript.rawdata

[Package ppc version 1.01 Index]