-
Notifications
You must be signed in to change notification settings - Fork 4
/
code_for_github_brain.R
351 lines (279 loc) · 11.4 KB
/
code_for_github_brain.R
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
#### R code for brain preprocessing and normalizing
## andrew jaffe
#
## load packages
library(limma)
library(sva)
library(splines)
library(GEOquery)
# custon functions
# string split wrapper
ss = function(x, pattern, slot=1,...) sapply(strsplit(x,pattern,...), function(y) y[slot])
splitit = function(x) split(seq(along=x),x) # wrapper for split
## plotting function
mypar = function(a=1,b=1,brewer.n=8,brewer.name="Dark2",...){
par(mar=c(2.5,2.5,1.6,1.1),mgp=c(1.5,.5,0))
par(mfrow=c(a,b),...)
palette(brewer.pal(brewer.n,brewer.name))
}
# regress SVs out of expression data
cleaningP = function(y, mod, svaobj,P=ncol(mod)) {
X=cbind(mod,svaobj$sv)
Hat=solve(t(X)%*%X)%*%t(X)
beta=(Hat%*%t(y))
cleany=y-t(as.matrix(X[,-c(1:P)])%*%beta[-c(1:P),])
return(cleany)
}
## plot patterns over age
agePlotter = function(y, age, mod, mainText, smoothIt=TRUE,
orderByAge=TRUE,ylim=NULL,ageBreaks = c(-1, 0, 1, 10, 100),
ylab="Adjusted Expression",pointColor = 2, lineColor= 1, ...) {
if(orderByAge) {
oo = order(age, decreasing = FALSE)
y = y[oo] ; age = age[oo] ; mod = mod[oo,]
}
fit = fitted(lm(y~mod-1))
fetal = cut(age, breaks =ageBreaks ,lab=F)
fIndex = splitit(fetal)
layout(matrix(c(1,1,1,2,2,3,3,4,4,4,4,4),nr = 1,byrow = T))
palette(brewer.pal(8,"Set1"))
par(mar = c(4,5,3,0.45))
if(is.null(ylim)) ylims = range(y,na.rm=TRUE) else ylims = ylim
xx = jitter(age,amount=0.005)
plot(y ~ xx,
subset=fIndex[[1]],
main = "", ylab=ylab,xlab="",
ylim = ylims,cex.axis = 1.5, cex.lab=1.75,
pch = 21, cex = 1.4,xaxt="n",bg = pointColor,
xlim=c(range(age[fIndex[[1]]])+c(-0.01,0.07)),...)
if(smoothIt) lines(age[fIndex[[1]]],fit[fIndex[[1]]],col=lineColor,lwd=6)
axis(1,at=unique(age[fIndex[[1]]]),
labels = 40+52*signif(unique(age[fIndex[[1]]]),1), cex.axis=1.5)
text(x = quantile(age[fIndex[[1]]],0.33), y= min(ylims), "Weeks", cex=1.5)
# infant + child
par(mar = c(4, 0.25,3,0.25))
for(j in 2:3) {
plot(y ~ age, subset=fIndex[[j]],
main = "",ylab="",xlab="",yaxt = "n", cex=1.4,
xlim = range(age[fIndex[[j]]])+c(-0.03,0.03),
ylim = ylims, cex.axis = 1.5,pch = 21, bg=pointColor)
if(ageBreaks[2] == 0 & smoothIt) lines(age[fIndex[[j]]],fit[fIndex[[j]]],col=lineColor,lwd=6)
if(ageBreaks[2] < 0 & smoothIt) lines(age[fIndex[[j]]][-1],fit[fIndex[[j]]][-1],col=lineColor,lwd=6)
}
# adults
par(mar = c(4, 0.25,3,1))
plot(y ~ age, subset=fIndex[[4]],
main = "",ylab="",xlab="",yaxt = "n", cex=1.4,
xlim = range(age[fIndex[[4]]])+c(-0.01,0.01),
ylim = ylims, cex.axis = 1.5,pch = 21, bg=pointColor)
if(smoothIt) lines(age[fIndex[[4]]],fit[fIndex[[4]]],col=lineColor,lwd=6)
mtext(mainText, outer=T, line=-2.5,cex=1.35)
mtext("Age", side=1, outer=T, line=-1.5,cex=1.35)
}
###################################
### PREPROCESS FROM GEO
# to get phenotype and processed data
theData = getGEO("GSE30272")
pdList = lapply(theData,pData)
pd = do.call("rbind",pdList)
pd = pd[,c(1,2,grep("characteristics", names(pd)))]
pd = pd[,1:10]
pList = lapply(theData, exprs)
p = do.call("cbind", pList)
colnames(p) = rownames(pd) = pd$title
# do some formatting
colNames = apply(pd[,3:10], 2, function(x) {
ss(as.character(x),": ", 1)[1]
})
colnames(pd)[3:10] = colNames
pd[,3:10] = apply(pd[,3:10], 2, function(x) {
ss(as.character(x),": ", 2)
})
pd$title = as.character(pd$title)
pd$geo_accession = as.character(pd$geo_accession)
for(i in c(3,4,7,8,9)) pd[,i] = as.numeric(pd[,i])
## map
map = as(featureData(theData[[1]]), "data.frame")
rownames(map) = rownames(p) = map$OligoID
## RAW
getGEOSuppFiles("GSE30272")
system("gunzip GSE30272/GSE30272_RGna.n269.o30176.log2ratio.loess.MADout.KNNimp.txt.gz")
p = read.table("GSE30272/GSE30272_RGna.n269.o30176.log2ratio.loess.MADout.KNNimp.txt",
header=TRUE, as.is=TRUE, row.names=1)
map = map[rownames(p),]
## order by age
oo = order(pd$age)
p = p[,oo] ; pd = pd[oo,]
p = as.matrix(p)
######################
##### perform modeling
# fetal offset
fetal = ifelse(pd$age < 0, 1, 0)
# linear spline
age = pd$age
ageF = age
ageF[ageF <0]=0
modLin = model.matrix(~age+ageF+fetal)
svaobjLin = sva(p, modLin)
## spline, deg=2
ageSpline = bs(pd$age, knots = 0, degree=2)
modCurve = model.matrix(~ageSpline + fetal)
svaobjCurve = sva(p, modCurve)
ageSpline1 = bs(pd$age[pd$age < 0], degree=2)
ageSpline1 = cbind(ageSpline1, 0,0,0,0,0,0)
ageSpline2 = cbind(0,0,bs(pd$age[pd$age > 0], knots = c(0.6,10,20,50),degree=2))
mod = model.matrix(~rbind(ageSpline1, ageSpline2)+fetal)
svaobj = sva(p, mod)
save(svaobjLin,svaobjCurve,svaobj,
file="svaobj_fetalBreaks_svaPaper.rda")
# load("svaobj_fetalBreaks_svaPaper.rda")
#########################################
# check residuals from taking out each model from raw data
resLin = p - fitted(lmFit(p,modLin))
resCurve = p - fitted(lmFit(p,modCurve))
resRaw = p - rowMeans(p)
resMod = p - fitted(lmFit(p,mod))
rssLin = rowSums(resLin^2)
rssCurve = rowSums(resCurve^2)
rssRaw = rowSums(resRaw^2)
rssMod = rowSums(resMod^2)
infantChild = which(pd$age > 0 & pd$age < 20)
rssLinIC = rowSums(resLin[,infantChild]^2)
rssCurveIC = rowSums(resCurve[,infantChild]^2)
rssRawIC = rowSums(resRaw[,infantChild]^2)
rssModIC = rowSums(resMod[,infantChild]^2)
######
cleanpLin = cleaningP(p,modLin,svaobjLin)
cleanpCurve = cleaningP(p,modCurve,svaobjCurve)
cleanp = cleaningP(p,mod,svaobj)
### most "spliny"
oo = order(rssMod - rssCurve, decreasing=FALSE)
# age = log2(pd$age+1)
i = oo[1]
pdf("plots/brainSpline_rawLine.pdf", h = 4.5, w = 6)
agePlotter(p[i,], pd$age, modLin, mainText=rownames(p)[i],ylim=range(p[i,]))
dev.off()
pdf("plots/brainSpline_rawCurve.pdf", h = 4.5, w = 6)
agePlotter(p[i,], pd$age, modCurve, mainText=rownames(p)[i],ylim=range(p[i,]))
dev.off()
pdf("plots/brainSpline_rawFinal.pdf", h = 4.5, w = 6)
agePlotter(p[i,], pd$age, mod, mainText=rownames(p)[i],ylim=range(p[i,]))
dev.off()
pdf("plots/brainSpline_cleanLine.pdf", h = 4.5, w = 6)
agePlotter(cleanpLin[i,], pd$age, mod, mainText=rownames(p)[i],
ylim=range(p[i,]), lineColor = "green")
dev.off()
pdf("plots/brainSpline_cleanCurve.pdf", h = 4.5, w = 6)
agePlotter(cleanpCurve[i,], pd$age, mod, mainText=rownames(p)[i],
ylim=range(p[i,]), lineColor = "green")
dev.off()
pdf("plots/brainSpline_cleanFinal.pdf", h = 4.5, w = 6)
agePlotter(cleanp[i,], pd$age, mod, mainText=rownames(p)[i],
ylim=range(p[i,]), lineColor = "green")
dev.off()
########
## look at residuals
cleanpDiff = cleanp - p
cleanpLinDiff = cleanpLin - p
cleanpCurveDiff = cleanpCurve - p
rss2 = rowSums(cleanpDiff^2)
rssLin2 = rowSums(cleanpLinDiff^2)
rssCurve2 = rowSums(cleanpCurveDiff^2)
mypar(brewer.name="Set1")
plot(density(log10(rss2)), lwd = 3, col = 1)
lines(density(log10(rssLin2)), lwd = 3, col = 2)
lines(density(log10(rssCurve2)), lwd = 3, col = 3)
smoothScatter(log10(rss2), log10(rssLin2),
xlab = "Final",ylab="Line");abline(0,1,col="red")
smoothScatter(log10(rss2), log10(rssCurve2),
xlab = "Final",ylab="Curve");abline(0,1,col="red")
smoothScatter(log10(rssLin2), log10(rssCurve2),
xlab = "Line",ylab="Curve");abline(0,1,col="red")
pdf("smooth_scatters_brainModels_supplementary.pdf")
M = log10(rss2) - log10(rssLin2)
A = (log10(rss2) + log10(rssLin2))/2
smoothScatter(M~A, ylab = "Log10(Final) - Log10(Line)",
xlab="Avg Log10(RSS)", ylim = c(-0.8, 0.45),
cex.axis=1.6)
abline(h=mean(M), col="red",lwd=1.5)
abline(h=0, col="black",lty=2,lwd=1.5)
text(x = 3, y = 0.1, sum(M > 0),cex=2)
text(x = 3, y =- 0.1, sum(M < 0),cex=2)
M = (log10(rss2) - log10(rssCurve2))
A = (log10(rss2) + log10(rssLin2))/2
smoothScatter(M~A, ylab = "Log10(Final) - Log10(Curve)",
xlab="Avg Log10(RSS)", ylim = c(-0.8, 0.45),
cex.axis=1.6)
abline(h=mean(M), col="red",lwd=1.5)
abline(h=0, col="black",lty=2,lwd=1.5)
text(x = 3, y = 0.1, sum(M > 0),cex=2)
text(x = 3, y =- 0.1, sum(M < 0),cex=2)
M = (log10(rssCurve2) - log10(rssLin2))
A = (log10(rss2) + log10(rssLin2))/2
smoothScatter(M ~ A, ylab = "Log10(Curve) - Log10(Line)",
xlab="Avg Log10(RSS)", ylim = c(-0.8, 0.45),
cex.axis=1.6)
abline(h=mean(M), col="red",lwd=1.5)
abline(h=0, col="black",lty=2,lwd=1.5)
text(x = 3, y = 0.1, sum(M > 0),cex=2)
text(x = 3, y =- 0.1, sum(M < 0),cex=2)
dev.off()
###### PCA
pcaRaw = prcomp(t(p))
pca = prcomp(t(cleanp))
pcaLin = prcomp(t(cleanpLin))
pcaCurve = prcomp(t(cleanpCurve))
pcaVarsRaw=signif(((pcaRaw$sdev)^2)/(sum((pcaRaw$sdev)^2)),3)*100
pcaVars=signif(((pca$sdev)^2)/(sum((pca$sdev)^2)),3)*100
pcaVarsLin=signif(((pcaLin$sdev)^2)/(sum((pcaLin$sdev)^2)),3)*100
pcaVarsCurve=signif(((pcaCurve$sdev)^2)/(sum((pcaCurve$sdev)^2)),3)*100
ageGroup2 = cut(pd$age, breaks = c(-0.5,0,0.6,seq(10,80,by=10)), labels=F)
ageGroup2Names = c("Fetal","Infant","Child","Teens","20s","30s",
"40s","50s","60s","70+s")
palette(c("purple","darkblue","blue","lightblue","grey","green",
"yellow","orange","darkorange","red"))
pdf("pca_by_diff_models.pdf", h = 12, w = 8)
mypar(3,2)
palette(c("purple","darkblue","blue","lightblue","grey","green",
"yellow","orange","darkorange","red"))
plot(pca$x[,1], pca$x[,2], pch = 21, bg = as.numeric(ageGroup2),
main = "Final Spline Model",cex=1.2,
xlab = paste("PC1:",pcaVars[1],"% of Variance Explained"),
ylab = paste("PC2:",pcaVars[2],"% of Variance Explained"))
plot(pca$x[,3], pca$x[,2], pch = 21, bg = as.numeric(ageGroup2),
main = "Final Spline Model",cex=1.2,
ylab = paste("PC2:",pcaVars[2],"% of Variance Explained"),
xlab = paste("PC3:",pcaVars[3],"% of Variance Explained"))
plot(pcaLin$x[,1], pcaLin$x[,2], pch = 21, bg = as.numeric(ageGroup2),
main = "Linear Spline Model",cex=1.2,
xlab = paste("PC1:",pcaVarsLin[1],"% of Variance Explained"),
ylab = paste("PC2:",pcaVarsLin[2],"% of Variance Explained"))
plot(pcaLin$x[,3], pcaLin$x[,2], pch = 21, bg = as.numeric(ageGroup2),
main = "Linear Spline Model",cex=1.2,
ylab = paste("PC2:",pcaVarsLin[2],"% of Variance Explained"),
xlab = paste("PC3:",pcaVarsLin[3],"% of Variance Explained"))
plot(pcaCurve$x[,1], pcaCurve$x[,2], pch = 21, bg = as.numeric(ageGroup2),
main = "Curve Spline Model",cex=1.2,
xlab = paste("PC1:",pcaVarsCurve[1],"% of Variance Explained"),
ylab = paste("PC2:",pcaVarsCurve[2],"% of Variance Explained"))
plot(pcaCurve$x[,3], pcaCurve$x[,2], pch = 21, bg = as.numeric(ageGroup2),
main = "Curve Spline Model",cex=1.2,
ylab = paste("PC2:",pcaVarsCurve[2],"% of Variance Explained"),
xlab = paste("PC3:",pcaVarsCurve[3],"% of Variance Explained"))
dev.off()
pdf("pcs_vs_age_by_diff_models_Final.pdf", h = 5, w = 8)
for(i in 1:6) agePlotter(pca$x[,i], pd$age, mod,
mainText=paste("Final Model, PC",i), ylab=paste0("PC",i))
dev.off()
pdf("pcs_vs_age_by_diff_models_Raw.pdf", h = 5, w = 8)
for(i in 1:6) agePlotter(pcaRaw$x[,i], pd$age, mod,
mainText=paste("Raw, PC",i), ylab=paste0("PC",i))
dev.off()
pdf("pcs_vs_age_by_diff_models_Line.pdf", h = 5, w = 8)
for(i in 1:6) agePlotter(pcaLin$x[,i], pd$age, mod,
mainText=paste("Linear Spline Model, PC",i), ylab=paste0("PC",i))
dev.off()
pdf("pcs_vs_age_by_diff_models_Curve.pdf", h = 5, w = 8)
for(i in 1:6) agePlotter(pcaCurve$x[,i], pd$age, mod,
mainText=paste("Curve Spline Model, PC",i), ylab=paste0("PC",i))
dev.off()