我读了对正则表达式和哈德利韦翰的stringr和dplyr包,但无法弄清楚如何得到这个工作.
我在数据框中有图书馆流通数据,电话号码作为字符变量.我想取最初的大写字母并将其作为一个新变量,将字母和句点之间的数字转换为第二个新变量.
Call_Num
HV5822.H4 C47 Circulating Collection, 3rd Floor
QE511.4 .G53 1982 Circulating Collection, 3rd Floor
TL515 .M63 Circulating Collection, 3rd Floor
D753 .F4 Circulating Collection, 3rd Floor
DB89.F7 D4 Circulating Collection, 3rd Floor