[R] Grouping Question

[Thomas Subia]

Colleagues,

Here is my dataset.

Serial	Measurement	Meas_test	Serial_test
1	17		fail		fail
1	16		pass		fail
2	12		pass		pass
2	8		pass		pass
2	10		pass		pass
3	19		fail		fail
3	13		pass		pass

If a measurement is less than or equal to 16, then Meas_test is pass. Else
Meas_test is fail
This is easy to code.

Serial_test is a pass, when all of the Meas_test are pass for a given
serial. Else Serial_test is a fail.
I'm at a loss to figure out how to do this in R.

Some guidance would be appreciated.

All the best,

Thomas Subia