R $ operator is invalid for atomic vectors -


i have dataset 1 of columns "#" sign. used following code remove column.

ia <- as.data.frame(sapply(ia,gsub,pattern="#",replacement=""))

however, after operation, 1 of integer column had changed factor.

i wonder happened , how can avoid that. appreciate it.

a more correct version of code might this:

d <- data.frame(x = as.character(1:5),y = c("a","b","#","c","d")) > d[] <- lapply(d,gsub,pattern = "#",replace = "") > d   x y 1 1 2 2 b 3 3   4 4 c 5 5 d

but you'll note, approach never remove offending column. it's replacing # values empty character strings. remove column of # might this:

d <- data.frame(x = as.character(1:5),                 y = c("a","b","#","c","d"),                 z = rep("#",5)) > d[,!sapply(d,function(x) all(x == "#"))]   x y 1 1 2 2 b 3 3 # 4 4 c 5 5 d

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