pps: A misc function for finding NN time slots in pressure profile...

In protViz: Visualizing and Analyzing Mass Spectrometry Related Data in Proteomics

A misc function for finding NN time slots in pressure profile data.

Description

The function computes a list of Pc values for the in time provided NN using findNN. It returns file, time, timediff and the Pc valyes as list.

Usage

    pps(data, time)

Arguments

data	the data set to be plotted. It reqires the following attributes: Pc, file, time.
time	specifies the timeslots to be used.

Details

The function is useful for levelplots. It can be used to make a quality check over a sequence of experiments. At our site, it is used in conjugtion with Eksigent pumps. These devices store a text file at the instrument pc. These files are preprocessed as specified in the file structure.

Author(s)

Christian Panse 2012

Examples

library(lattice)
data(pressureProfile)

# do the pre processing
pps.data<-pps(pressureProfile, time=seq(25,40,by=5))

print(xyplot(Pc ~ as.factor(file) | paste("time =", 
    as.character(time), "minutes"),
    panel = function(x, y){
        m<-sum(y)/length(y)
        m5<-(max(y)-min(y))*0.05
        panel.abline(h=c(m-m5,m,m+m5), 
            col=rep("#ffcccc",3),lwd=c(1,2,1))
        panel.grid(h=-1, v=0)
        panel.xyplot(x, y)
    },
    ylab='Pc [psi]',
    layout=c(1,4),
    sub='The three read lines indicate avg plus min 5%.',
    scales = list(x = list(rot = 45)),
    data=pps.data))

protViz documentation built on May 29, 2024, 8:21 a.m.