Early in my science career I believed that any good piece of software included a graphical user interface (GUI). That was many years ago, and during that time I delved deep into the art of Tcl/Tk programming; using the tcltk package to create GUI’s ... [Read more...]

The U.S. Geological Survey (USGS) recently published a report describing a groundwater-flow model of the Wood River Valley (WRV) aquifer system. What makes this report unique (at least in my opinion) was the authors’ desire to make their work as r... [Read more...]

The knitr package provides an easy way to embed R code in a Jekyll-Bootstrap blog post. The only required input is an R Markdown source file. The name of the source file used to generate this post is 2012-07-03-knitr-jekyll.Rmd, available here. Steps taken to build this post ... [Read more...]

I’d like to introduce you to the Grid2Polygons function; an R function for converting sp spatial objects from class SpatialGridDataFrame to SpatialPolygonsDataFrame. The significance of this conversion is that spatial polygons can be transformed to a different projection or datum with the spTransform function in package rgdal. Postscript ... [Read more...]

Colors are mysterious business and choosing the right color or color palette for an R graphics can sometimes be a chore. To alleviate this burden, I present two functions for choosing color values. To access these functions install the RSurvey and dichromat packages:

install.packages<span>(</span>c<span>(</span><span>"RSurvey"</span><span>,</span> <span>"dichromat"</span><span>))</span>
library<span>(</span>RSurvey<span>)</span>

Choose Color The first function, ChooseColor (... [Read more...]