comparison genomeview.r @ 11:b7f1d9f8f3bc

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author xuebing
date Sat, 10 Mar 2012 07:59:27 -0500
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10:1558594a3c2e 11:b7f1d9f8f3bc
1
2 caloffset = function(genome){
3 total_len = sum(as.numeric(genome[,2]))
4 offset = 0
5 for (i in 1:nrow(genome)) {
6 offset = c(offset,offset[i]+genome[i,2])
7 }
8 offset
9 }
10
11 coverage = function(intervals,genome,offset,resolution) {
12
13 nChr = length(offset) - 1
14 total_len = offset[nChr+1]
15 nbin = as.integer(total_len / resolution)
16 cov = numeric(nbin)#coverage
17 col = numeric(nbin)#color
18 for (i in 1:nChr) {
19 d = x[x[,1]==as.character(genome[i,1]),2:3]
20 d = ceiling(((d[,1]+d[,2])/2+offset[i])*nbin/total_len)
21 t = table(d)
22 pos = as.numeric(row.names(t))
23 cov[pos] = cov[pos] + as.numeric(t)
24 col[pos] = i
25 }
26 list(nbin=nbin,cov=cov,col=col)
27 }
28
29 # plot coverage
30 # res = genomeView(x,genome,100000)
31 plotcov = function(res,genome,offset,title,uselog) {
32 if (uselog == 'log'){
33 res$cov = log10(res$cov+1)
34 }
35 ymax = max(res$cov)
36 #print(ymax)
37 par(mar=c(5,5,5,1))
38 plot(seq(length(res$cov)),res$cov,type='h',cex=0.1,cex.axis=2,cex.lab=2,cex.main=3,col=res$col,xaxt='n',main=title,xlab='chromosome',ylab='coverage',frame.plot=F,ylim=c(0,ymax))
39 xticks = numeric(nrow(genome))
40 for (i in 1:nrow(genome)){
41 xticks[i] = (offset[i]+offset[i+1])/2*res$nbin/offset[length(offset)]
42 }
43 mtext(genome[,1],side=1,at=xticks,adj=1,las=2,col=seq(nrow(genome)))
44 }
45
46 union_correlation = function(x,y){
47 z = x>0 | y>0
48 cor(x[z],y[z])
49 }
50
51
52 heatmap2 = function(x,scale,sym,margins,labRow,labCol){
53 h = heatmap(x,scale=scale,sym=sym,margins=margins,labRow=labRow,labCol=labCol)
54 x = x[h$rowInd,h$colInd]
55 tx = numeric(0)
56 ty = numeric(0)
57 txt = character(0)
58 for (i in 1:nrow(x)){
59 for (j in 1:ncol(x)){
60 tx <- c(tx,i)
61 ty <- c(ty,ncol(x)-j+1)
62 txt <- c(txt,format(x[i,j],digits=2,nsmall=2))
63 }
64 }
65 #heatmap(x,scale=scale,sym=sym,margins=margins,labRow=labRow[h$rowInd],labCol=labCol[h$colInd],add.expr=text(1:4,1:4,1:4))
66 cat(dim(tx))
67 text(tx,ty,txt)
68 heatmap(x,scale=scale,sym=sym,margins=margins,labRow=labRow[h$rowInd],labCol=labCol[h$colInd],add.expr=text(tx,ty,txt))
69
70 }