35篇文章 · 5046字 · 5人關(guān)注
-
20190506-R語言向量操作函數(shù)splitsplit：Usagesplit(x, f, drop = FALSE, ...);將向量x根據(jù)因子f進(jìn)行分組，返回一個(gè)list盲泛，每一個(gè)子lis...
-
20190506-R語言向量操作函數(shù)assign、get键耕、mgetUsage ①assign(x, value, pos = -1, envir = as.environment(pos), inherits ...
-
20190506-R語言向量操作函數(shù)cut
cut Usagecut(x, breaks, labels = NULL, include.lowest = FALSE, right = T...
-
20190506-R語言向量操作函數(shù)match寺滚、pmatch、charmatch
match Usagematch(x, table, nomatch = NA_integer_, incomparables = NULL);...
-
20190506-R語言向量操作函數(shù)
①duplicated(x, fromLast = FALSE, ...) fromLast若為TRUE屈雄，則從后向前查 ②setdiff(x,y...
-
20190506-R語言字符處理函數(shù)※grep村视、grepl※ grep Usagegrep(pattern, x, ignore.case = FALSE, perl = FALSE, value = ...
-
20190506-R語言字符處理函數(shù)※ strsplitstrsplit Usagestrsplit(x, split, fixed = FALSE, perl = FALSE, useBytes =...
-
20190506-R語言字符處理函數(shù)paste、paste0
paste Usagepaste(..., sep = " ", collapse = NULL)拼接一個(gè)（collapse參數(shù)）或多個(gè)（sep...
-
20190506-R語言字符處理函數(shù)substr酒奶、substring蚁孔、sub奶赔、gsubsubstr Usagesubstr(x, start, stop);提取或替換特定位置的字符，類比chartrExample substrin...