Supplement 1. SAS code containing the algorithms described in our paper.

Name: Supplement 1. SAS code containing the algorithms described in our paper.
Published: 2016-08-05T05:31:56+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/
Keywords: negative binomial distribution, count data, trend detection, precision, power analysis, hierarchical models, fingernail clams, Environmental Science, Ecology

dataset

posted on 2016-08-05, 05:31 authored by Brian R. Gray, Michele M. Burlew

File List

Power trends grouped counts analytical.sas -- SAS code.

Power trends grouped counts simulation.sas -- SAS code.

Description

Power trends grouped counts analytical.sas uses the analytical method described in the main article for approximating standard errors, precision, and power associated with detecting trends across grouped count data. Power trends grouped counts simulation.sas uses simulations and repeated calls to a nonlinear mixed model to estimate power to detect trends across grouped count data. Parameters are defined at the bottom of the macro. Both files must be run using SAS statistical software. Further details are provided in the macros, and in the original paper.