XmRChart: A function to construct individual (X) and moving range (mR)...

In srtaheri/MSstatsQC: Longitudinal system suitability monitoring and quality control for proteomic experiments

Description

A function to construct individual (X) and moving range (mR) control charts

Usage

XmRChart(data = NULL, peptide, L = 1, U = 5, metric,
  normalization = FALSE, ytitle = "Individual observations",
  type = "mean", selectMean = NULL, selectSD = NULL)

Arguments

data	comma-separated (.csv), metric file. It should contain a "Precursor" column and the metrics columns. It should also include "Annotations" for each observation.
peptide	the name of precursor of interest.
L	Lower bound of the guide set.
U	Upper bound of the guide set.
metric	the name of metric of interest.
normalization	TRUE if metric is standardized and FALSE if not standardized.
ytitle	the y-axis title of the plot. Defaults to "Individual observations". The x-axis title is by default "Time : name of peptide"
type	the type of the control chart. Two values can be assigned, "mean" or "variability". Default is "mean".
selectMean	the mean of a metric. It is used when mean is known. It is NULL when mean is not known. The default is NULL.
selectSD	the standard deviation of a metric. It is used when standard deviation is known. It is NULL when mean is not known. The default is NULL.

Value

A plot of individual values or moving ranges versus time per peptide and metric generated from XmR.data.prepare data frame.

Examples

# First process the data to make sure it's ready to use
sampleData <- DataProcess(S9Site54)
head(sampleData)
# Find the name of the peptides
levels(sampleData$Precursor)
# Calculate X and mR statistics
XmRChart(data = sampleData, peptide = "VLVLDTDYK", metric = "BestRetentionTime")
XmRChart(data = sampleData, peptide = "VLVLDTDYK", metric = "BestRetentionTime",
         ytitle = "moving ranges", type = "variability")
XmRChart(data = sampleData, peptide = "VLVLDTDYK", metric = "BestRetentionTime",
         selectMean = 27.78, selectSD = 8.19)
XmRChart(data = sampleData, peptide = "DDGSWEVIEGYR", metric = "TotalArea")
XmRChart(data = sampleData, peptide = "DDGSWEVIEGYR", metric = "TotalArea",
         selectMean = 35097129, selectSD = 34132861)
XmRChart(data = sampleData, peptide = "TAAYVNAIEK", metric = "MaxFWHM")
XmRChart(data = sampleData, peptide = "LVNELTEFAK", metric = "Peak Assymetry")

srtaheri/MSstatsQC documentation built on May 30, 2019, 8:41 a.m.