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How to change a text value in an R data frame?
To change a text value in an R data frame, we can simply use replace function.
For Example, if we have a data frame called df that contains a column say Names and one of the names say Raj is misspelled as Raaj then we can replace Raaj with Raj by using the command given below −
df$Names<-replace(df$Names,df$Names=="Raaj","Raj")
Example 1
Following snippet creates a sample data frame −
Gender<-sample(c("Male","Femalee"),20,replace=TRUE)
Gender_dat<-data.frame(Gender)
Gender_datThe following dataframe is created
Gender 1 Femalee 2 Male 3 Femalee 4 Male 5 Male 6 Male 7 Femalee 8 Femalee 9 Femalee 10 Male 11 Male 12 Male 13 Femalee 14 Male 15 Femalee 16 Male 17 Femalee 18 Male 19 Male 20 Male
To replace Femalee in df1 with Female on the above created data frame, add the following code to the above snippet −
Gender<-sample(c("Male","Female"),20,replace=TRUE)
Gender_dat<-data.frame(Gender)
Gender_dat$Gender<-
replace(Gender_dat$Gender,Gender_dat$Gender=="Femalee","Female")
Gender_datOutput
If you execute all the above given snippets as a single program, it generates the following Output −
Gender 1 Female 2 Male 3 Female 4 Male 5 Male 6 Male 7 Female 8 Female 9 Female 10 Male 11 Male 12 Male 13 Female 14 Male 15 Female 16 Male 17 Female 18 Male 19 Male 20 Male
Example 2
Following snippet creates a sample data frame −
Transaction<-sample(c("Online","Ofline"),20,replace=TRUE)
Trans_dat<-data.frame(Transaction)
Trans_datThe following dataframe is created
Transaction 1 Online 2 Online 3 Online 4 Ofline 5 Ofline 6 Online 7 Ofline 8 Ofline 9 Ofline 10 Ofline 11 Ofline 12 Ofline 13 Online 14 Ofline 15 Online 16 Ofline 17 Online 18 Online 19 Online 20 Online
To replace Ofline in df2 with Offline on the above created data frame, add the following code to the above snippet −
Transaction<-sample(c("Online","Offline"),20,replace=TRUE)
Trans_dat<-data.frame(Transaction)
Trans_dat$Transaction<-
replace(Trans_dat$Transaction,Trans_dat$Transaction=="Ofline","Offline")
Trans_datOutput
If you execute all the above given snippets as a single program, it generates the following Output −
Transaction 1 Online 2 Online 3 Online 4 Offline 5 Offline 6 Online 7 Offline 8 Offline 9 Offline 10 Offline 11 Offline 12 Offline 13 Online 14 Offline 15 Online 16 Offline 17 Online 18 Online 19 Online 20 Online
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