gsub在R中套用组合

Question

我试图在数据帧的每一列上使用gsub来删除一些字符，我尝试使用apply来完成此操作，但未成功：

data<-apply(data,2, function(x) gsub("£","",data[x]))

返回错误

Error in `[.data.frame`(data, x) : undefined columns selected

我知道如果我做得到

for(i in 1: length(data)){data[,i]<-gsub("£","",data[,i]) }

但是为什么申请电话不起作用？

Answer 1

这是下一个最佳的可复制示例。尽管如果我再努力一点的话，可能会有更好/更快的（矢量化）方式。但由于您要求申请：

# just turn it to characters in order to 
# turn . to , ... was just the first dataset that came to
# but as character should not be necessary for your data
ds[] <- sapply(mtcars,function(x) gsub("\\.",",",as.character(x)))