我正面临着无法在R工作室创建数据框架的问题,我试图使用for循环使事情变得更容易,但它无法创建。是不能在数据框架内使用for循环还是应该在数据框架外使用for循环?代码如下
set.seed(1)
ran <-sample(1:3, 9, replace=TRUE)
obs = c()
z1 <- data.frame(
for(i in 1:3){
obs = c(obs, ran[i])
X= c(X, q3data$X[ran[i]]),
Y= c(Y, q3data$Y[ran[i]])
}
)
z1
,这里是结果
> set.seed(1)
> ran <-sample(1:3, 9, replace=TRUE)
> obs = c()
> z1 <- data.frame(
+ for(i in 1:3){
+ obs = c(obs, ran[i])
+ X= c(X, q3data$X[ran[i]]),
Error: unexpected ',' in:
" obs = c(obs, ran[i])
X= c(X, q3data$X[ran[i]]),"
> Y= c(Y, q3data$Y[ran[i]])
> }
Error: unexpected '}' in " }"
> )
Error: unexpected ')' in ")"
> z1
data frame with 0 columns and 0 rows
你不能这么做,试试:
for(i in 1:3){
obs = c(obs, ran[i])
X= c(X, q3data$X[ran[i]]),
Y= c(Y, q3data$Y[ran[i]])
}
z1 <- data.frame(X=X, Y=Y)