[R] gsub question

[arun]

Hi,
Try:
 string1<- "Red, Romeo, Calf"
 string2<- "Red, Rome, Ralf"
 string3<- "China, Japan, USA"
 gsub("R[[:alpha:]]{1,}","MM",string3)
#[1] "China, Japan, USA"
gsub("R[[:alpha:]]{1,}","MM",string2)
#[1] "MM, MM, MM"
 gsub("R[[:alpha:]]{1,}","MM",string1)
#[1] "MM, MM, Calf"


Other way would be:

 paste(gsub("^R.*\\w+","MM",strsplit(string1, ", ")[[1]]),collapse=", ")
#[1] "MM, MM, Calf"
A.K.




Hi all, 

I want to replace all words that begin with a given character 
with a different word. Tried gsub and str_replace_all but with little 
success. In this example I want to replace all words starting with R 
with MM. gsub replaces properly only once: 

> gsub("^R*\\w+", "MM", "Red, Rome, Ralf") 
[1] "MM, Rome, Ralf" 

Thanks in advance