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實施例的數據:無效因子水平`strsplit`數據
tmp <-
c("30.55,114.27", "39.31,115.92", "0,0", "0,0", "27.35,111.78",
"0,0", "34.47,118.97", "34.62,113.72", "0,0", "0,0", "0,0", "31.43,120.55",
"0,0", "0,0", "31.67,119.82", "44.28,129.04", "23.37,113.44",
"23.31,112.84", "24.41,102.34", "30.77,104.24", "0,0")
環路串分割數據:
dat1 <- data.frame(as.character(NA),as.character(NA))
for(i in 1:length(tmp)){#nrow(train2)){
dat1[i,] <- do.call(rbind, strsplit(tmp[i], ","))
}
問題:
有50級或更多的警告(使用警告()來查看第一個50)
Warning messages: 1: In `[<-.factor`(`*tmp*`, iseq, value = "0") : invalid factor level, NA generated 2: In `[<-.factor`(`*tmp*`, iseq, value = "0") : invalid factor level, NA generated 3: In `[<-.factor`(`*tmp*`, iseq, value = "29.29") : invalid factor level, NA generated 4: In `[<-.factor`(`*tmp*`, iseq, value = "106.25") : invalid factor level, NA generated 5: In `[<-.factor`(`*tmp*`, iseq, value = "0") : invalid factor level, NA generated 6: In `[<-.factor`(`*tmp*`, iseq, value = "0") :
但是,如果我運行它只是1行,它看起來右:
> do.call(rbind, strsplit(tmp[i], ","))
[,1] [,2]
[1,] "30.55" "114.27"
看看'for(循環)之前的'str(dat1)',這個警告信息可能會更有意義。 – joran
...也許你更喜歡更像'do.call(rbind,lapply(tmp,function(x)strsplit(x,「,」)[[1]]))''? – joran
關於第一條評論,我看到了你的觀點。儘管我可以發誓,但當我使用數字設置'dat1'時,我得到了同樣的錯誤。讓我在第二條評論中嘗試一下代碼。只需1秒。 –