changeset 6:c637c3bf6781 draft

Uploaded

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ballgown.R	Wed Apr 26 08:45:30 2017 -0400
@@ -0,0 +1,73 @@
+#!/usr/bin/Rscript
+
+# Enabling commands line arguments. Using optparse which allows to use options.
+# ----------------------------------------------------------------------------------------
+
+suppressMessages(library(optparse, warn.conflicts = FALSE))
+opt_list=list(
+make_option(c("-d", "--directory"), type="character", default=NULL, help="directory containing the samples", metavar="character"),
+make_option(c("-p", "--phendat"), type="character", default=NULL, help="phenotype data(must be a .csv file)", metavar="character"),
+make_option(c("-t","--outputtranscript"), type="character", default="output_transcript.csv", help="output_transcript.csv: contains the transcripts of the expirements", metavar="character"),
+make_option(c("-g","--outputgenes"), type="character", default="output_genes.csv", help="output_genes.csv: contains the genes of the expirements", metavar="character"),
+make_option(c("-e","--texpression"), type="double", default="0.5", help="transcripts expression filter", metavar="character"),
+make_option(c("--bgout"), type="character", default="", help="save the ballgown object created in the process", metavar="character")
+)
+opt_parser=OptionParser(option_list=opt_list)
+opt=parse_args(opt_parser)
+
+# Loading required libraries. suppressMessages() remove all noisy attachement messages
+# ----------------------------------------------------------------------------------------
+
+suppressMessages(library(ballgown, warn.conflicts = FALSE))
+suppressMessages(library(genefilter, warn.conflicts = FALSE))
+suppressMessages(library(dplyr, warn.conflicts = FALSE))
+
+# Setup for the tool with some bases variables.
+# ----------------------------------------------------------------------------------------
+
+
+filtstr = opt$texpression
+pdat = 2
+phendata = read.csv(opt$phendat)
+setwd(opt$dir)
+
+# Checking if the pdata file has the right samples names.
+# ----------------------------------------------------------------------------------------
+
+if (all(phendata$ids == list.files(".")) != TRUE)
+{
+  stop("Your phenotype data table does not match the samples names. ")
+}
+
+# Creation of the ballgown object based on data
+# ----------------------------------------------------------------------------------------
+bgi = ballgown(dataDir= "." , samplePattern="", pData = phendata, verbose = FALSE)
+
+# Filter the genes with an expression superior to the input filter
+# ----------------------------------------------------------------------------------------
+bgi_filt= subset(bgi, paste("rowVars(texpr(bgi)) >",filtstr), genomesubset = TRUE)
+
+# Creating the variables containing the transcripts and the genes and sorting them through the arrange() command.
+# Checking if there's one or more adjust variables in the phenotype data file
+# ----------------------------------------------------------------------------------------
+
+if (ncol(pData(bgi))<=3) {
+  results_transcripts=stattest(bgi_filt,feature = "transcript", covariate = colnames(pData(bgi))[pdat], adjustvars = colnames(pData(bgi)[pdat+1]), getFC = TRUE, meas = "FPKM")
+  results_genes=stattest(bgi_filt,feature = "gene", covariate = colnames(pData(bgi))[pdat], adjustvars = colnames(pData(bgi)[pdat+1]), getFC = TRUE, meas = "FPKM")
+} else {
+  results_transcripts=stattest(bgi_filt,feature = "transcript", covariate = colnames(pData(bgi))[pdat], adjustvars = c(colnames(pData(bgi)[pdat+1:ncol(pData(bgi))])), getFC = TRUE, meas = "FPKM")
+  results_genes=stattest(bgi_filt,feature = "gene", covariate = colnames(pData(bgi))[pdat], adjustvars = c(colnames(pData(bgi)[pdat+1:ncol(pData(bgi))])), getFC = TRUE, meas = "FPKM")
+}
+
+results_transcripts = data.frame(geneNames=ballgown::geneNames(bgi_filt), geneIDs=ballgown::geneIDs(bgi_filt), results_transcripts)
+results_transcripts = arrange(results_transcripts,pval)
+results_genes = arrange(results_genes,pval)
+
+# Main output of the wrapper, two .csv files containing the genes and transcripts with their qvalue and pvalue
+#This part also output the data of the ballgown object created in the process and save it in a R data file
+# ----------------------------------------------------------------------------------------
+write.csv(results_transcripts, opt$outputtranscript, row.names = FALSE)
+write.csv(results_genes, opt$outputgenes, row.names = FALSE)
+if (opt$bgout != ""){
+  save(bgi, file=opt$bgout)
+}