Publications by dylan
Compiling rgdal on Mac OS 10.5
Why do I always forget how to do this? R CMD INSTALL rgdal –configure-args=“–with-gdal-config=/Library/Frameworks/GDAL.framework/Versions/Current/unix/bin/gdal-config –with-proj-include=/Library/Frameworks/PROJ.framework/Versions/4/Headers/ –with-proj-lib=/Library/Frameworks/PROJ.framework/Versions/Current/unix/lib/” You will need to ...
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Compiling Source Packages on R 2.15.x / Mac OS 10.5.x
For some reason R is not happy with its 64-bit cousin when installing source packages: * installing *source* package ‘XMLSchema’ ... ** R ** inst ** preparing package for lazy loading ** help *** installing help indices ** building package indices ** installing vignettes ** testing if installed package can be loaded *** arch - i386 *** arch -...
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Summarizing Circular Data in R: Aspect Angle
The orientation of terrain surface (aspect) can have dramatic effects on landscape-scale variation in soil temperature and moisture. Summarizing aspect angle is complicated by the fact that sampled values are measured on a circular scale. The circular package for R can be used to summarize, model, and visualize this type of data. An example func...
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Basic Simulation of Soil Profile Data in R via AQP
Something fun to play with before the new year: experimental code in aqp for simulating soil profile data from a single “template” profile. The basic idea: simulate horizon thickness data using a family of Gaussian functions with mean defined by horizon thickness values found in the template and standard deviation defined by the user. Larger ...
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New AQP Tutorials
Soil Series Extent Several new AQP-related tutorials have been posted to the R-Forge project page. SoilProfileCollection class/method documentation soil series extent mapping examples read more Related To leave a comment for the author, please follow the link and comment on their blog: dylan's blog. R-bloggers.com offers daily e-mail update...
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Visualizing CA Snow Survey Data in R
The CDEC website provides access to a wide range in hydrologic data (stream flow, snow survey, etc.) collected in California. The following code and functions (attached at the bottom of the page) illustrate how to query CDEC, and graphically compare the May 2011 snow survey data with the historic record at 15 sites. Data in this format lend well ...
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AQP News and Updates
The AQP family of R packages has seen a lot of development over the last 3 months. Some of the highlights include: HTML manual pages with syntax-highlighting and figures, c/o knitr new vignettes: “dealing with bad data”, gridded SSURGO (gSSURGO) demo, and “aggregating properties by bedrock kind” a new package called sharpshootR containin...
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Modeling an Infant’s Feeding Schedule with Periodic Smoothing Splines
Feeding Schedule While on paternity leave I had an opportunity to test out periodic smoothing splines (within the framework of generalized additive models) on an interesting time-series– an infant’s feeding schedule. read more Related To leave a comment for the author, please follow the link and comment on their blog: dylan's blog. R-blog...
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