R 将数据帧转换为m x n表
我想将我的R 将数据帧转换为m x n表,r,dataframe,R,Dataframe,我想将我的dataframe转换成mxn表。 我的原始数据简化版本的代码和视图如下： set.seed(1) dat <- data.frame(x = rep(c("A","B","C","D","E"),2), y = c("R","S",rep(c("P","Q","R","S"),2)), val = sample(2:20,10)) x y val 1 A R 7 2 B S 8 3 C
dataframemxnset.seed(1)
dat <- data.frame(x = rep(c("A","B","C","D","E"),2),
y = c("R","S",rep(c("P","Q","R","S"),2)),
val = sample(2:20,10))
x y val
1 A R 7
2 B S 8
3 C P 11
4 D Q 16
5 E R 5
6 A S 14
7 B P 15
8 C Q 9
9 D R 19
10 E S 2
set.seed（1）
dat您可以从数据中使用dcast（）
library(data.table)
set.seed(1)
dat <- data.frame(x = rep(c("A","B","C","D","E"),2),
y = c("R","S",rep(c("P","Q","R","S"),2)),
val = sample(2:20,10))
dcast(dat, x ~ y, value.var = "val")
x P Q R S
1 A NA NA 7 14
2 B 15 NA NA 8
3 C 11 9 NA NA
4 D NA 16 19 NA
5 E NA NA 5 2
库（data.table）
种子（1）
dat您可以从数据中使用dcast（）
library(data.table)
set.seed(1)
dat <- data.frame(x = rep(c("A","B","C","D","E"),2),
y = c("R","S",rep(c("P","Q","R","S"),2)),
val = sample(2:20,10))
dcast(dat, x ~ y, value.var = "val")
x P Q R S
1 A NA NA 7 14
2 B 15 NA NA 8
3 C 11 9 NA NA
4 D NA 16 19 NA
5 E NA NA 5 2
库（data.table）
种子（1）
dat Try库（tidyverse）；dat%>%排列（y，val）
Trylibrary（tidyverse）；dat%>%价差（y，val）