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comparison Contra/scripts/cn_analysis.v4.R @ 0:7564f3b1e675

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author fcaramia
date Thu, 13 Sep 2012 02:31:43 -0400
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1 # ----------------------------------------------------------------------#
2 # Copyright (c) 2011, Richard Lupat & Jason Li.
3 #
4 # > Source License <
5 # This file is part of CONTRA.
6 #
7 # CONTRA is free software: you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation, either version 3 of the License, or
10 # (at your option) any later version.
11 #
12 # CONTRA is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
16 #
17 # You should have received a copy of the GNU General Public License
18 # along with CONTRA. If not, see <http://www.gnu.org/licenses/>.
19 #
20 #
21 #-----------------------------------------------------------------------#
22 # Last Updated : 30 Sept 2011 17:00PM
23
24
25 # Parameters Parsing (from Command Line)
26 options <- commandArgs(trailingOnly = T)
27 bins = as.numeric(options[1])
28 rd.cutoff = as.numeric(options[2])
29 min.bases = as.numeric(options[3])
30 outf = options[4]
31 sample.name = options[5]
32 plotoption = options[6]
33 actual.bin = as.numeric(options[7])
34 min_normal_rd_for_call = as.numeric(options[8])
35 min_tumour_rd_for_call = as.numeric(options[9])
36 min_avg_cov_for_call = as.numeric(options[10])
37
38 if (sample.name == "No-SampleName")
39 sample.name = ""
40
41 if (sample.name != "")
42 sample.name = paste(sample.name, ".", sep="")
43
44 # Setup output name
45 out.f = paste(outf, "/table/", sample.name, "CNATable.", rd.cutoff,"rd.", min.bases,"bases.", bins,"bins.txt", sep="")
46 pdf.out.f = paste(outf, "/plot/", sample.name, "densityplot.", bins, "bins.pdf", sep="")
47
48 # Open and read input files
49 # cnAverageFile = paste("bin", bins, ".txt", sep="")
50 cnAverageFile = paste(outf,"/buf/bin",bins,".txt",sep="")
51 boundariesFile = paste(outf,"/buf/bin",bins,".boundaries.txt",sep="")
52 print (cnAverageFile)
53 cn.average = read.delim(cnAverageFile, as.is=F, header=F)
54 cn.boundary= read.delim(boundariesFile,as.is=F, header=F)
55
56 # Apply thresholds and data grouping
57 cn.average.aboveTs = cn.average[cn.average$V3>min.bases,]
58 cn.average.list = as.matrix(cn.average.aboveTs$V4)
59
60 # Get the mean and sd for each bins
61 cn.average.mean = c()
62 cn.average.sd = c()
63 cn.average.log= c()
64
65 # Density Plots for each bins
66 if (plotoption == "True"){
67 pdf(pdf.out.f)
68 }
69 for (j in 1:actual.bin){
70 cn.average.nth = as.matrix(cn.average.aboveTs[cn.average.aboveTs$V15==j,]$V4)
71 cn.coverage.nth = as.matrix(cn.average.aboveTs[cn.average.aboveTs$V15==j,]$V11)
72 boundary.end = cn.boundary[cn.boundary$V1==j,]$V2
73 boundary.start = cn.boundary[cn.boundary$V1==(j-1),]$V2
74 boundary.mid = (boundary.end+boundary.start)/2
75 if (plotoption == "True") {
76 plot_title = paste("density: bin", bins, sep="")
77 #plot(density(cn.average.nth),xlim=c(-5,5), title=plot_title)
78 plot(density(cn.average.nth),xlim=c(-5,5))
79 }
80 cn.average.mean = c(cn.average.mean, mean(cn.average.nth))
81 # cn.average.sd = c(cn.average.sd, sd(cn.average.nth))
82 cn.average.sd = c(cn.average.sd, apply(cn.average.nth,2,sd))
83 #cn.average.log = c(cn.average.log, boundary.mid)
84 cn.average.log = c(cn.average.log, log(mean(cn.coverage.nth),2))
85 }
86 if (plotoption == "True"){
87 dev.off()
88 }
89
90 # Put the data's details into matrices
91 ids = as.matrix(cn.average.aboveTs$V1)
92 exons = as.matrix(cn.average.aboveTs$V6)
93 exons.pos = as.matrix(cn.average.aboveTs$V5)
94 gs = as.matrix(cn.average.aboveTs$V2)
95 number.bases = as.matrix(cn.average.aboveTs$V3)
96 mean = as.matrix(cn.average.aboveTs$V4)
97 sd = as.matrix(cn.average.aboveTs$V7)
98 tumour.rd = as.matrix(cn.average.aboveTs$V8)
99 tumour.rd.ori = as.matrix(cn.average.aboveTs$V10)
100 normal.rd = as.matrix(cn.average.aboveTs$V9)
101 normal.rd.ori = as.matrix(cn.average.aboveTs$V11)
102 median = as.matrix(cn.average.aboveTs$V12)
103 MinLogRatio = as.matrix(cn.average.aboveTs$V13)
104 MaxLogRatio = as.matrix(cn.average.aboveTs$V14)
105 Bin = as.matrix(cn.average.aboveTs$V15)
106 Chr = as.matrix(cn.average.aboveTs$V16)
107 OriStCoordinate = as.matrix(cn.average.aboveTs$V17)
108 OriEndCoordinate= as.matrix(cn.average.aboveTs$V18)
109
110 # Linear Fit
111 logratios.mean = mean
112 logcov.mean = log2((normal.rd + tumour.rd)/2)
113 fit.mean = lm(logratios.mean ~ logcov.mean)
114 fit.x = fit.mean$coefficient[1]
115 fit.y = fit.mean$coefficient[2]
116
117 adjusted.lr = rep(NA, length(logratios.mean))
118 for (j in 1:length(logratios.mean)){
119 fitted.mean = fit.x + fit.y * logcov.mean[j]
120 adjusted.lr[j] = logratios.mean[j] - fitted.mean
121 }
122
123 fit.mean2 = lm(adjusted.lr ~ logcov.mean)
124 fit.mean.a = fit.mean2$coefficient[1]
125 fit.mean.b = fit.mean2$coefficient[2]
126
127 fit.mean.fn <- function(x, fit.a, fit.b){
128 result = fit.a + fit.b * x
129 return (result)
130 }
131
132 # Adjust SD based on the new adjusted log ratios
133 logratios.sd = c()
134 logcov.bins.mean= c()
135 for (j in 1:actual.bin){
136 lr.bins.mean = as.matrix(adjusted.lr[cn.average.aboveTs$V15==j])
137 # logratios.sd = c(logratios.sd, sd(lr.bins.mean))
138 logratios.sd = c(logratios.sd, apply(lr.bins.mean,2,sd))
139
140 cn.coverage.tumour.nth = as.matrix(cn.average.aboveTs[cn.average.aboveTs$V15==j,]$V8)
141 cn.coverage.normal.nth = as.matrix(cn.average.aboveTs[cn.average.aboveTs$V15==j,]$V9)
142 cn.coverage.nth = (cn.coverage.tumour.nth + cn.coverage.normal.nth) /2
143 logcov.bins.mean= c(logcov.bins.mean, log2(mean(cn.coverage.nth)))
144
145 }
146
147 logratios.sd.ori = logratios.sd
148 if (length(logratios.sd) > 2) {
149 logratios.sd = logratios.sd[-length(logratios.sd)]
150 }
151
152 logcov.bins.mean.ori = logcov.bins.mean
153 if (length(logcov.bins.mean) > 2){
154 logcov.bins.mean= logcov.bins.mean[-length(logcov.bins.mean)]
155 }
156
157 fit.sd = lm(log2(logratios.sd) ~ logcov.bins.mean)
158 fit.sd.a = fit.sd$coefficient[1]
159 fit.sd.b = fit.sd$coefficient[2]
160
161 fit.sd.fn <- function(x, fit.a, fit.b){
162 result = 2 ^ (fit.mean.fn(x, fit.a, fit.b))
163 return (result)
164 }
165
166 # Get the P Values, called the gain/loss
167 # with average and sd from each bins
168 pVal.list = c()
169 gain.loss = c()
170
171 for (i in 1:nrow(cn.average.list)){
172 #print (i)
173 #logratio = cn.average.list[i]
174 #logcov = log(normal.rd.ori[i],2)
175 logratio = adjusted.lr[i]
176 logcov = logcov.mean[i]
177 exon.bin = Bin[i]
178
179 if (length(logratios.sd) > 1){
180 pVal <- pnorm(logratio, fit.mean.fn(logcov, fit.mean.a, fit.mean.b), fit.sd.fn(logcov, fit.sd.a, fit.sd.b))
181 } else {
182 pVal <- pnorm(logratio, 0, logratios.sd[exon.bin])
183 }
184
185 if (pVal > 0.5){
186 pVal = 1-pVal
187 gain.loss = c(gain.loss, "gain")
188 } else {
189 gain.loss = c(gain.loss, "loss")
190 }
191 pVal.list = c(pVal.list, pVal*2)
192 }
193
194 # Get the adjusted P Values
195 adjusted.pVal.list = p.adjust(pVal.list, method="BH")
196
197 # Write the output into a tab-delimited text files
198 outdf=data.frame(Targeted.Region.ID=ids,Exon.Number=exons,Gene.Sym=gs,Chr, OriStCoordinate, OriEndCoordinate, Mean.of.LogRatio=cn.average.list, Adjusted.Mean.of.LogRatio=adjusted.lr, SD.of.LogRatio=sd, Median.of.LogRatio=median, number.bases, P.Value=pVal.list ,Adjusted.P.Value=adjusted.pVal.list , gain.loss, tumour.rd, normal.rd, tumour.rd.ori, normal.rd.ori, MinLogRatio, MaxLogRatio, BinNumber = Bin)
199
200 #min_normal_rd_for_call=5
201 #min_tumour_rd_for_call=0
202 #min_avg_cov_for_call=20
203 outdf$tumour.rd.ori = outdf$tumour.rd.ori-0.5
204 outdf$normal.rd.ori = outdf$normal.rd.ori-0.5
205 wh.to.excl = outdf$normal.rd.ori < min_normal_rd_for_call
206 wh.to.excl = wh.to.excl | outdf$tumour.rd.ori < min_tumour_rd_for_call
207 wh.to.excl = wh.to.excl | (outdf$tumour.rd.ori+outdf$normal.rd.ori)/2 < min_avg_cov_for_call
208 outdf$P.Value[wh.to.excl]=NA
209 outdf$Adjusted.P.Value[wh.to.excl]=NA
210
211
212 write.table(outdf,out.f,sep="\t",quote=F,row.names=F,col.names=T)
213
214 #Plotting SD
215 #a.sd.fn = rep(fit.sd.a, length(logratios.sd.ori))
216 #b.sd.fn = rep(fit.sd.b, length(logratios.sd.ori))
217 #sd.after.fit = fit.sd.fn(logcov.bins.mean.ori, fit.sd.a, fit.sd.b)
218 #sd.out.f = paste(outf, "/plot/", sample.name, "sd.data_fit.", bins, "bins.txt", sep="")
219 #sd.outdf = data.frame(SD.Before.Fit = logratios.sd.ori, Log.Coverage = logcov.bins.mean.ori, SD.After.Fit = sd.after.fit, a.for.fitting=a.sd.fn, b.for.fitting=b.sd.fn)
220 #write.table(sd.outdf, sd.out.f,sep="\t", quote=F, row.names=F, col.names=T)
221
222
223 #End of the script
224 print ("End of cn_analysis.R")
225 print (i)
226
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228