Publications by dylan
Updates to the ‘aqp’ Package for R (version 0.98-3)
Just released an updated version of our ‘aqp’ package for quantitative soils investigations, available on CRAN and R-Forge. Some of the major changes are listed below: from the aqp NEWS file: -------------------------- aqp 0.98-1 (2010-11-23) -------------------------- * added basic demo: demo(aqp) * soil.slot() now computes aggregate probab...
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Customizing Maps in R: spplot() and latticeExtra functions
I recently noticed the new latticeExtra page on R-forge, which contains many very interesting demos of new lattice-related functionality. There are strong opinions about the “best” graphics system in R (base graphics, grid graphics, lattice, ggplot, etc.)– I tend to use base graphics for simple figures and lattice for depicting multivariate...
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Temporal Trends in Soil Science Jargon — via Google Ngram Viewer
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 updates about R news and tutorials about learning R and many other topics. Click here if you're looking to post or find an R/data-science job. Want to share your content on R-bloggers? click...
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Experimental S4 Classes and Methods added to AQP (Algorithms for Quantitative Pedology) Package
Thanks to some help from Pierre Roudier, the aqp package now has some new S4-style classes and methods– custom tailored to the complexities of soil profile data. These new classes/methods are only available in the aqp development branch, found on our R-Forge repository. A couple of examples are presented below. Note that methods may change at a...
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Tips for Using our Google Earth Interface to SoilWeb
GE SoilWeb Demo The folks in Lincoln recently changed the links to the OSDs from http:// to https:// style URLs… which seems to cause problems for new versions of Google Earth. I have noticed that when clicking on soil profile sketches an error is returned (something about an SSL handshake problem). This can be fixed by asking Google Earth to u...
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Initial SoilWeb Concept on Paper
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 updates about R news and tutorials about learning R and many other topics. Click here if you're looking to post or find an R/data-science job. Want to share your content on R-bloggers? click...
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Updates to SoilWeb Mobile: Distance from Nearest Map Unit Boundary
Working on some new ideas on how map unit data can be summarized on small screens– particularly for our mobile version of SoilWeb. The distance from the nearest map unit polygon boundary is now printed above mini soil profile sketches. This gives the user a little more information that can be used to judge a relative degree of confidence in the...
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A Lattice Panel Function for Filled Polygons that Accounts for Missing Data
This is a quick update to some code posted while back, related to plotting filled polygons within a lattice panel function. After attempting to use the originally described function to plot data with NA, I quickly realized that a more robust approach was required– panel.polygon() does not deal well with missing data. A new function of the same ...
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GEOSTAT 2011 — Canberra
Just got back from the 2011 GEOSTAT summer school that recently took place in Canberra, Australia. Thanks to Tom Hengl for the invitation to co-teach the course, to the great folks at ANU who made it possible, and to all of the students who participated. Most of the material from the class is available on the course website, including slides, R s...
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Visualizing Terrain Surface Indicies with Scaled Arrows
Hamish Bowman recently posted a new GRASS module (d.barb) that can be used to depict the direction and magnitude components of some vector (e.g. wind field) along a raster surface or at points in space. An example (c/o Hamish): read more Related To leave a comment for the author, please follow the link and comment on their blog: dylan's blog....
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