35篇文章 · 5046字 · 5人关注
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20190506-R语言向量操作函数splitsplit：Usagesplit(x, f, drop = FALSE, ...);将向量x根据因子f进行分组，返回一个list，每一个子lis...
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20190506-R语言向量操作函数assign、get、mgetUsage ①assign(x, value, pos = -1, envir = as.environment(pos), inherits ...
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20190506-R语言向量操作函数cut
cut Usagecut(x, breaks, labels = NULL, include.lowest = FALSE, right = T...
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20190506-R语言向量操作函数match、pmatch、charmatch
match Usagematch(x, table, nomatch = NA_integer_, incomparables = NULL);...
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20190506-R语言向量操作函数
①duplicated(x, fromLast = FALSE, ...) fromLast若为TRUE，则从后向前查 ②setdiff(x,y...
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20190506-R语言字符处理函数※grep、grepl※ grep Usagegrep(pattern, x, ignore.case = FALSE, perl = FALSE, value = ...
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20190506-R语言字符处理函数※ strsplitstrsplit Usagestrsplit(x, split, fixed = FALSE, perl = FALSE, useBytes =...
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20190506-R语言字符处理函数paste、paste0
paste Usagepaste(..., sep = " ", collapse = NULL)拼接一个（collapse参数）或多个（sep...
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20190506-R语言字符处理函数substr、substring、sub、gsubsubstr Usagesubstr(x, start, stop);提取或替换特定位置的字符，类比chartrExample substrin...
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