getextcalib.massvector {mscalib}R Documentation

External Error Model

Description

Returns the error model obtained from the calibration sample.

Usage

## S3 method for class 'massvector':
getextcalib(object,calib,error=300,...)

Arguments

...
calib massvector with calibration masses
error relative measurment error in ppm.
object massvector

Details

In case of external calibration some sample spots are only dedicated to calibration. Calibration samples which produces equidistant peaks, which exact masses are known, can be used to precisely estimate the mass dependent error function.

Value

calibspline can be used to calibrate peaklists

Author(s)

Witold Wolski wolski@molgen.mpg.de

References

-
Gobom J, Mueller M, Egelhofer V, Theiss D, Lehrach H, Nordhoff E, 2002. A calibration method that simplifies and improves accurate determination of peptide molecular masses by MALDI-TOF MS. Anal Chem. 74(15):3915-23.
-
Wolski http://www.molgen.mpg.de/~wolski/mscalib

See Also

calibspline, applyextcalib.massvector,

Examples

 data(mv1)
 data(ppg)
 res<-getextcalib(ppg[[1]])
 mv2 <- applycalib(res,mv1)
 plot(mv1[,1],mv2[,1]-mv1[,1])

[Package Contents]