2011-03-11 58 views
0

我无法在线找到此问题的解决方案,就像看起来那么简单。下面是它是: 我有这样名称的数据帧DF1:用矩阵代替data.frame

    PIM  WDR  MYC  OBX       
ILMN_1651282 0.555764 0.675233 0.5908629 0.4897703       
ILMN_1651354 0.6963458 0.8588675 0.9216328 0.88705       
ILMN_1651358 0.7501548 0.6766059 0.8157319 0.9373666       
ILMN_1652716 0.5505098 0.5802357 0.7342341 0.5953167       
ILMN_1654324 0.9294231 0.9311051 0.8424824 0.888825       
ILMN_1654639 0.9197155 0.4687101 0.678938 0.4309232       
ILMN_1655418 0.690068 0.6345875 0.9595042 0.6132203 

像这样名称的dataframefile DF2:

  PIM WDR MYC OBX            
ILMN_1651282 -1 -1 -1 -1            
ILMN_1651354 -1 1 1 1            
ILMN_1651358 1 1 1 1            
ILMN_1652716 -1 -1 -1 -1            
ILMN_1654324 -1 -1 -1 -1            
ILMN_1654639 -1 -1 -1 -1            
ILMN_1655418 1 1 -1 1 

我有0.8的临界值。在DF1高于0.8的每一个值在0改变所有0.8下的值必须由值DF2被替换(1 & -1)

创建DF2:

PIMvsEV<-list() 
for (x in 1:nrow(df1)) { 
t<-(if (mean(PIM[,x]) > mean(EV[,x])) {print(1)} else 
if (mean(PIM[,x]) < mean(EV[,x])) {print(-1)}) 
PIMvsEV[[x]]<-matrix(t) 
} 

WDRvsEV<-list() 
for (x in 1:nrow(df1)) { 
t<-(if (mean(WDR[,x]) > mean(EV[,x])) {print(1)} else 
if (mean(WDR[,x]) < mean(EV[,x])) {print(-1)}) 
WDRvsEV[[x]]<-matrix(t) 
} 

OBXvsEV<-list() 
for (x in 1:nrow(cdf1)) { 
t<-(if (mean(OBX[,x]) > mean(EV[,x])) {print(1)} else 
if (mean(OBX[,x]) < mean(EV[,x])) {print(-1)}) 
OBXvsEV[[x]]<-matrix(t) 
} 

MYCvsEV<-list() 
for (x in 1:nrow(df1)) { 
t<-(if (mean(MYC[,x]) > mean(EV[,x])) {print(1)} else 
if (mean(MYC[,x]) < mean(EV[,x])) {print(-1)}) 
MYCvsEV[[x]]<-matrix(t) 
} 

dataframe<-as.data.frame(cbind(as.matrix(PIMvsEV), as.matrix(WDRvsEV))) 
dataframe<-as.data.frame(cbind(as.matrix(dataframe), as.matrix(MYCvsEV))) 
dataframe<-as.data.frame(cbind(as.matrix(dataframe), as.matrix(OBXvsEV))) 
row.names(dataframe)<-colnames(ttest) 
colnames(dataframe)<-c("PIM","WDR","MYC","OBX") 

任何想法?事先非常感谢,

Lisanne

+0

您是否试过使用应用函数? http://nsaunders.wordpress.com/2010/08/20/a-brief-introduction-to-apply-in-r/ – 2011-03-11 09:47:19

+0

只是一个快速的Q,你是如何派生df2的? – 2011-03-11 11:29:25

+0

我是否有权假定您的df1中的数据具有与列一样多的行数?什么是电动汽车? – 2011-03-11 12:06:17

回答

1

示例数据:

df1 <- as.data.frame(matrix(rnorm(100),10,10)) 
df2 <- as.data.frame(matrix(sample(c(-1,1),100,T),10,10)) 

Data.frames代码

res <- df1 
res[df1>0.8] <- 0 
res[df1<=0.8] <- df2[df1<=0.8] 
1

这应该做你想做的吧?

一些数据:

df1 <- as.data.frame(matrix(rnorm(100),10,10)) 
df2 <- matrix(sample(c(-1,1),100,T),10,10) 

矢量化使用的ifelse

ifelse(as.matrix(df1) > 0.8, 0, df2) 

     V1 V2 V3 V4 V5 V6 V7 V8 V9 V10 
[1,] 0 0 1 -1 1 1 -1 -1 1 -1 
[2,] -1 1 1 -1 -1 -1 -1 -1 1 -1 
[3,] -1 -1 -1 0 0 -1 1 0 1 -1 
[4,] 0 -1 -1 1 -1 1 -1 1 1 1 
[5,] -1 -1 -1 -1 0 1 -1 1 0 0 
[6,] -1 1 1 1 -1 1 0 0 1 1 
[7,] -1 1 1 0 -1 -1 -1 -1 -1 -1 
[8,] 1 1 1 0 -1 -1 1 -1 0 -1 
[9,] 1 0 0 1 1 0 -1 -1 0 -1 
[10,] -1 -1 -1 -1 1 -1 -1 -1 -1 1 

或者我们可以做

(df1<= 0.8)*df2 
+0

非常感谢您的解决方案!这就是我正在寻找一整天! – lisanne 2011-03-11 12:23:53