search for: ssurgo

Displaying 2 results from an estimated 2 matches for "ssurgo".

2017 Oct 05
3
working with ordinal predictor variables?
I'm trying to develop a linear model for crop productivity based on variables published as part of the SSURGO database released by the USDA. My default is to just run lm() with continuous predictor variables as numeric, and discrete predictor variables as factors, but some of the discrete variables are ordinal (e.g. drainage class, which ranges from excessively drained to excessively poorly drained), but...
2017 Oct 05
0
working with ordinal predictor variables?
...it." -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip ) On Thu, Oct 5, 2017 at 10:54 AM, Alexandra Thorn <alexandra.thorn at gmail.com> wrote: > I'm trying to develop a linear model for crop productivity based on > variables published as part of the SSURGO database released by the > USDA. My default is to just run lm() with continuous predictor > variables as numeric, and discrete predictor variables as factors, but > some of the discrete variables are ordinal (e.g. drainage class, which > ranges from excessively drained to excessively p...