Question

我的数据如下：

            SMA    SMA.1      EMA    SMA.2  SMA.1.1    EMA.1
2016-08-30 1.12411 1.114418 42.50321 100.9875 102.7288 61.25217

SMA，SMA.1和EMA都是针对一种变量进行的计算。我们称之为A1。同样，SMA.2 SMA.1.1，EMA属于A2。这一直持续到第29个变量A29。我想创建一个看起来像这样的表：

Var   SMA       SMA.1       EMA
A1    1.12411   1.114418   42.50321
A2    100.9875  102.7288   61.25217

我一直试图通过for（）函数来解决这个问题，但它不起作用。如果它有用，请点击这里：

An ‘xts’ object on 2016-08-30/2016-08-30 containing:
  Data: num [1, 1:87] 1.12 1.11 42.5 100.99 102.73 ...
 - attr(*, "dimnames")=List of 2
  ..$ : NULL
  ..$ : chr [1:87] "SMA" "SMA.1" "EMA" "SMA.2" ...
  Indexed by objects of class: [POSIXct,POSIXt] TZ: 
  xts Attributes:  
 NULL
> length(new.trend(MergedData))
[1] 87
> dput(new.trend(MergedData))
structure(c(1.12411, 1.114418, 42.5032053202923, 100.9875, 102.7288, 
61.2521659094113, 1.30729, 1.312984, 48.6820468363914, 0.96929, 
0.976116, 63.3550259067348, 0.762599999999999, 0.75914, 36.9475885995277, 
1.29322, 1.301952, 58.0919871676451, 0.72508, 0.717614, 50.7849595338026, 
8.431315, 8.518538, 60.1081873107905, 8.22937, 8.378464, 56.4004957184729, 
24.03834, 24.251418, 57.4224323964315, 275.5605, 279.5882, 51.0296673272519, 
3.7801, 3.814314, 49.384958216963, 3.82987000000001, 3.88755, 
66.0031408704831, 64.45802, 64.756234, 52.7346708652452, 2.94456, 
2.979396, 51.219478918934, 13.79045, 13.967152, 73.6027751334041, 
3.2168, 3.231082, 54.8620717312901, 660.3725, 657.1164, 63.4249734975412, 
2903.875, 2961.2792, 47.0703023915683, 18.34358, 18.526388, 59.4661365407602, 
0.7604, 0.7558, 42.3745163443544, 6.65051000000001, 6.660192, 
62.9781410895429, 13173.25, 13135.84, 73.4189545097276, 66.9848050000001, 
66.9980439999999, 51.0467264878632, 1111.974, 1120.1316, 52.8805945280585, 
4.01933, 4.022258, 59.7858956387081, 1.3497, 1.348972, 70.0217831036426, 
46.48875, 46.79366, 45.2292753580903, 34.6466, 34.816, 37.0539681977138
), .Dim = c(1L, 87L), .Dimnames = list(NULL, c("SMA", "SMA.1", 
"EMA", "SMA.2", "SMA.1.1", "EMA.1", "SMA.3", "SMA.1.2", "EMA.2", 
"SMA.4", "SMA.1.3", "EMA.3", "SMA.5", "SMA.1.4", "EMA.4", "SMA.6", 
"SMA.1.5", "EMA.5", "SMA.7", "SMA.1.6", "EMA.6", "SMA.8", "SMA.1.7", 
"EMA.7", "SMA.9", "SMA.1.8", "EMA.8", "SMA.10", "SMA.1.9", "EMA.9", 
"SMA.11", "SMA.1.10", "EMA.10", "SMA.12", "SMA.1.11", "EMA.11", 
"SMA.13", "SMA.1.12", "EMA.12", "SMA.14", "SMA.1.13", "EMA.13", 
"SMA.15", "SMA.1.14", "EMA.14", "SMA.16", "SMA.1.15", "EMA.15", 
"SMA.17", "SMA.1.16", "EMA.16", "SMA.18", "SMA.1.17", "EMA.17", 
"SMA.19", "SMA.1.18", "EMA.18", "SMA.20", "SMA.1.19", "EMA.19", 
"SMA.21", "SMA.1.20", "EMA.20", "SMA.22", "SMA.1.21", "EMA.21", 
"SMA.23", "SMA.1.22", "EMA.22", "SMA.24", "SMA.1.23", "EMA.23", 
"SMA.25", "SMA.1.24", "EMA.24", "SMA.26", "SMA.1.25", "EMA.25", 
"SMA.27", "SMA.1.26", "EMA.26", "SMA.28", "SMA.1.27", "EMA.27", 
"SMA.29", "SMA.1.28", "EMA.28")), index = structure(1472533200, tzone = "", tclass = c("POSIXct", 
"POSIXt")), .indexTZ = "", class = c("xts", "zoo"), .indexCLASS = c("POSIXct", 
"POSIXt"), tclass = c("POSIXct", "POSIXt"), tzone = "")

Answer 1

简单：

new_data_mat <- matrix(data_mat[1,], ncol=3, byrow=T)
colnames(new_data_mat) <- c("SMA", "SMA2", "EMA")

Answer 2

@ thc的答案肯定更简单，但如果你想留一个循环，这也有效

# take vector of your data
Data <- Data[1,]
names(Data)
New.Data <- NULL
EMAc <- 3; SMAc <- 1; SMA.1c <- 2
for (i in 1:(length(Data)/3)){
  i.New.Data <- cbind(Var=paste("A",i,sep=""),
                      EMA=Data[i*EMAc],
                      SMA=Data[i*SMAc],
                      SMA.1=Data[i*SMA.1c])
  New.Data <- rbind(New.Data,i.New.Data)
}
New.Data

如何通过组合每个第三列来创建表？

2 个答案: