The checkr package checks the properties of common R objects.
The mcmcr package manipulates Markov Chain Monte Carlo (MCMC) samples.
The rtide package predicts tide heights for stations across the US.
The rpdo package provides monthly Pacific Decadal Oscillation data since 1900.
The yesno package asks a custom yes-no question with variable responses.
The wqbc package calculates water quality thresholds and indices for British Columbia.