Dr. John A. Kershaw, Jr. CF, RPF, Forest Mensurationist

“The really great forester combines technical knowledge with idealism; even though he may be mistaken in detail, he must be enough of a thinker to fathom the national needs of the future.” – Theodore S. Woolsey, Jr. (Riding the Chuck Line)

R Applications

Here are some of my R applications and examples to go along with them.

The Spatially Correlated Stand Structure Generator.

This code generates spatially explicit stand structures for up to 10 species using the method of copulas to develop the desired level of spatial and intra-tree correlation. The zipped code is available here, and a copy of the manuscript submitted to Computers and electronics in Agriculture is found here. A copy of the presentation I made at the 2008 Northeastern Mensurationists is found here.

Weibull Functions – This is a library of R functions that implements all standard forms of the Weibull distribution (full, left- and right-truncated, 2-parameter, 3-parameter and reverse distributions). It also has parameter recovery and maximum likelihood estimators and an interactive parameter estimation function. If you use these code please reference this URL.  The library can be downloaded here. More information will be available soonish.