Continuous (Non-Count) Skewed Data With Many Zeros
On Wed, 16 May 2012, Brian S Cade wrote:
I repeat - check out quantile regression in the quantreg package. If you have censored data (below detection limits), there are censored versions of quantile regression that can be used, crg() function has 3 alternative estimators.
Brian, Gotcha'. I'm learning of options that I need to carefully learn and evaluate. Will install and learn the quantreg package. Thanks, Rich
Richard B. Shepard, Ph.D. | Integrity - Credibility - Innovation Applied Ecosystem Services, Inc. | Helping Ensure Our Clients' Futures <http://www.appl-ecosys.com> Voice: 503-667-4517 Fax: 503-667-8863