I have two datasets
dataset1 with column fruit, customer_num
dataset2 with column fruit2, customer_num
So lets say I do a left join with dataset 1 to dataset 2, using customer_num as the joiner. Now I got a dataset with fruit and fruit2 as column variables.
How can a create an indicator to say if fruit==fruit2 then 1 else 0 ?
ifelse would be easiest, assuming it is in the same dataframe. Example using the dplyr package
dataset1 %>%
mutate(Match=ifelse(fruit==fruit2,1,0))
This will create a column called Match and do 1 if they match, 0 if they do not
You could do it like this (my example):
# I've created example of customer_num where I presumed that this are numbers
fruit <- data.frame(customer_num = c(1, 2, 3, 4, 5, 6))
fruit2 <- data.frame(customer_num = c(1, 2, 3, 10, 11, 12))
# Vector in data frame
df <- data.frame(fruit, fruit2)
# And match values / Indicator
dat<-within(df,match <- ifelse (fruit == fruit2,1,0))
# Output
customer_num customer_num.1 customer_num
1 1 1 1
2 2 2 1
3 3 3 1
4 4 10 0
5 5 11 0
6 6 12 0
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.