fitlogratios {ArArRedux} | R Documentation |
Extrapolation to 'time zero'
Description
This function extrapolates time resolved mass spectrometer data to
t=0. When fed with multicollector data, it forms the ratios of the
raw signals, forms their logs and performs linear regression to t=0
When fed with single collector data, the function first takes their
logs and extrapolates them to t=0 before taking ratios, unless
denmass
=NULL, in which case the logs of the raw signals are
extrapolated.
Usage
fitlogratios(x, ...)
## Default S3 method:
fitlogratios(x, ...)
## S3 method for class 'timeresolved'
fitlogratios(x, denmass, ...)
## S3 method for class 'PHdata'
fitlogratios(x, denmass = NULL, ...)
Arguments
x |
an object of class |
... |
further arguments (see below) |
denmass |
a string denoting the denominator isotope |
Value
an object of class logratios
Examples
samplefile <- system.file("Samples.csv",package="ArArRedux")
masses <- c("Ar37","Ar38","Ar39","Ar40","Ar36")
m <- loaddata(samplefile,masses) # samples and J-standards
blanklabel <- "EXB#"
l <- fitlogratios(blankcorr(m,blanklabel),"Ar40")
plotcorr(l)
[Package ArArRedux version 1.0 Index]