read.Data {RPPanalyzer}R Documentation

Read and Annotate RPPA rawdata

Description

reads sampledescription and slidedescription txt files and annotates the median expression value in GenePix result files stored in current working directory.

Usage

   read.Data(blocksperarray = 4, spotter = "arrayjet", writetable = FALSE)

Arguments

blocksperarray Integer describing the number of blocks in one array.
spotter character strings: default arrayjet or aushon.
writetable logical. If true data are exported as tab delimited text files to current working directory

Details

This function reads and annotates RPPA rawdata provided in three different kind of files. It is very important that these data files are in a correct format and stored in the same folder.

The file sampledescription.txt has to be a tab delimited text file with at least 6 columns named plate, column, row, sample_type, sample, concentration and in case of serially diluted samples a column dilution is required. The first 3 columns are describing the location of the sample in the source well plate. The 4th column describes the for different types of samples: measurement, control, neg_control or blank. In the column sample any character string describing the sample is possible. The column concentration has to contain only numerical values. Columns with further phenodata can be added.

The slidedescription.txt describes the array properties. Required columns are: gpr (describing the name of the corresponding gpr file), the columns pad, slide, incubation_run, spotting_run containing integers are generating a unique array identifier. The column target describes the analyzed target and AB_ID the used antibody. Column with further feature data can be added.

The third kind of files are the gpr files as results from image analysis software GenePix using the galfile from a aushon or arrayjet spotter.

Value

expression matrix with protein expression data
background matrix with background data
arraydescription data frame with feature data
sampledescription data frame with pheno data

Author(s)

Heiko Mannsperger <h.mannsperger@dkfz-heidelberg.de>

Examples

  library(RPPanalyzer)

  dataDir <- system.file("data",package="RPPanalyzer")
  setwd(dataDir)

  exData <- read.Data()

[Package RPPanalyzer version 1.0.2 Index]