The R operation in Q# is listed by Microsoft in the documentation as follows
operation R (pauli : Pauli, theta : Double, qubit : Qubit) : Unit
However, when I try to use the following command in a Q# operation,
I get an error, referencing the line of code for the R command:
The type of the given argument does not match the expected type.
Q1 is of course a Qubit, so I don't see what could be causing the problem. I've also been having difficulty getting the R1 gate working, but I suspect for similar reasons.
To see the relevant documentation, please visit R operation, Q# Docs.