如何在R中使用函数将单列data.table对象的首字母转换为大写?
为了将R中单列data.table对象的第一个字母转换为大写,我们可以按照以下步骤操作:
首先,创建一个包含字符串列的data.table对象。
然后,使用R.utils包中的capitalize函数将单列中的第一个字母转换为大写。
示例
创建data.table对象
让我们创建一个如下所示的data.table对象:
library(data.table) Students<- sample(c("rahul","rosy","hidayah","seema","john","sarbat","shaun","sam","teena","ila","kunal","sudha","anil","yukti","jerry","tom"),25,replace=TRUE) DT<-data.table(Students) DT
输出
执行上述脚本后,将生成以下输出(由于随机化,此输出会在您的系统上有所不同):
Students 1: sudha 2: sudha 3: rahul 4: rahul 5: kunal 6: rosy 7: anil 8: ila 9: shaun 10: kunal 11: jerry 12: hidayah 13: sudha 14: kunal 15: teena 16: yukti 17: seema 18: anil 19: rosy 20: anil 21: tom 22: teena 23: teena 24: teena 25: sam Students
将首字母转换为大写
使用R.utils包中的capitalize函数将Students列中的首字母转换为大写:
library(data.table) Students<- sample(c("rahul","rosy","hidayah","seema","john","sarbat","shaun","sam","teena","ila","kunal","sudha","anil","yukti","jerry","tom"),25,replace=TRUE) DT<-data.table(Students) library(R.utils) DT$Students<-capitalize(DT$Students) DT
输出
Students 1: Sudha 2: Sudha 3: Rahul 4: Rahul 5: Kunal 6: Rosy 7: Anil 8: Ila 9: Shaun 10: Kunal 11: Jerry 12: Hidayah 13: Sudha 14: Kunal 15: Teena 16: Yukti 17: Seema 18: Anil 19: Rosy 20: Anil 21: Tom 22: Teena 23: Teena 24: Teena 25: Sam Students
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