I don't think you need to melt the data.
given a data.frame raw
containing your raw
(unmelted) data
wilcox.test(value ~ type, data = raw)
should work.
Question
raw Data looks like this:
type value
1 a 10
2 a 20
3 a 30
4 b 50
5 b 10
6 b 20
melted data looks like this:
1 a value 10
2 b value 10
I want to apply wilcox.test to a,b To check whether a is greater than b. How to do that? thanks.
Solution
I don't think you need to melt the data.
given a data.frame raw
containing your raw
(unmelted) data
wilcox.test(value ~ type, data = raw)
should work.