R:必须提供符号或字符串作为参数

但它抱怨：

dt<-gather(dt,key=stat,value=c(`means`,`sds`,`medians`))

我最喜欢的答案是：

Error: Must supply a symbol or a string as argument

dt头（dt）
统计c（“平均值”、“sds”、“中值”）未命中率
1表示0.9677432 0.1
2表示0.7025229 0.1
3表示0.2191380 0.3
4表示0.6291055 0.3
5表示0.3078163 0.1
6 sds 0.5811671 0.1

只要做：

dt <- data.frame(means = runif(5),
                 sds = runif(5),
                 medians = runif(5),
                 MissedPercentage = sample(c(0.1,0.3),5,replace = T) )  

dt<-gather(dt,key=stat, value=c('means','sds','medians'), -MissedPercentage) %>% 
    select(2,3,1)

>head(dt)
stat c("means", "sds", "medians") MissedPercentage
1 means                    0.9677432              0.1
2 means                    0.7025229              0.1
3 means                    0.2191380              0.3
4 means                    0.6291055              0.3
5 means                    0.3078163              0.1
6   sds                    0.5811671              0.1

---

哪里是

MissedPercentage

？我已经为我做了一个编辑只有这个解决方案有效，Humpelstielzchen的给出了相同的错误<代码>tidyr*1.1.2 2020-08-27[1]CRAN（R 4.0.2）带参数名称

tidyr:：gather（数据=dt，键=stat，值=value，1:3，-4）

   stat c("means", "sds", "medians")  MissedPercentage
1 means                   0.12638209  0.1 
2 means                   0.80834248  0.1 
3 means                   0.94386651  0.3
4 means                   0.87709217  0.3
5 means                   0.30200943  0.3
6   sds                   0.06297956  0.1

dt <- data.frame(means = runif(5),
                 sds = runif(5),
                 medians = runif(5),
                 MissedPercentage = sample(c(0.1,0.3),5,replace = T) )  

dt<-gather(dt,key=stat, value=c('means','sds','medians'), -MissedPercentage) %>% 
    select(2,3,1)

>head(dt)
stat c("means", "sds", "medians") MissedPercentage
1 means                    0.9677432              0.1
2 means                    0.7025229              0.1
3 means                    0.2191380              0.3
4 means                    0.6291055              0.3
5 means                    0.3078163              0.1
6   sds                    0.5811671              0.1

tidyr::gather(dt,stat,value,1:3,-4)