data_greping.R

names2<-c("Ajay","Vijay","Rajesh","Arinjay","Ram")
gsub("jay","Ohjay",names2)

## [1] "AOhjay"    "ViOhjay"   "Rajesh"    "ArinOhjay" "Ram"

names3=toupper(names2)
names3

## [1] "AJAY"    "VIJAY"   "RAJESH"  "ARINJAY" "RAM"

grepl("jay",names3)

## [1] FALSE FALSE FALSE FALSE FALSE

library(stringr)
names4=str_to_upper(names2)
names4

## [1] "AJAY"    "VIJAY"   "RAJESH"  "ARINJAY" "RAM"

money=c("$50000","50,000",50000)
money2=gsub(",","",money)
money2

## [1] "$50000" "50000"  "50000"

money3=gsub("\\$","",money2)
money3

## [1] "50000" "50000" "50000"

money4=as.numeric(money3)
money4

## [1] 50000 50000 50000