Error dplyr summarise

Vote count:

0

I have a data.frame:

vector <- data.frame(patient=rep(1:5,each=2),medicine=rep(1:3,length.out=10),prob=rnorm(10))

I want to get the mean of the "prob" column while grouping by patient. I do this with the following code:

vector %>%
    group_by(patient) %>%
    summarise(average=mean(prob))

This code perfectly works. However, I need to get the same values without using the word "prob" on the "summarise" line. I tried the following code, but it gives me a data.frame in which the column "average" is a vector with 5 identical values, which is not what I want:

vector %>%
        group_by(patient) %>%
        summarise(average=mean(vector[,3]))

asked 48 secs ago

user3700322

27

Error dplyr summarise