Posts Tagged ‘ soil profile ’

AQP / soilDB Demo: Dueling Dendrograms

March 14, 2012
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AQP / soilDB Demo: Dueling Dendrograms

Previously, soil profile comparison methods from the aqp package only took into account horizon-level attributes. As of last week the profile_compare() function can now accommodate horizon and site-level attributes. In other words, it is now possible t...

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Logistic Power Peak (LPP) Simulated Soil Profiles

November 12, 2011
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Logistic Power Peak (LPP) Simulated Soil Profiles

A friend of mine recently published a very interesting article on the pedologic interpretation of asymetric peak functions fit to soil profile data (Myers et al., 2011). I won't bother summarizing or paraphrasing the article here, as the original artic...

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Experimental S4 Classes and Methods added to AQP (Algorithms for Quantitative Pedology) Package

February 23, 2011
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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 ...

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Updates to the ‘aqp’ Package for R (version 0.98-3)

November 30, 2010
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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) --------...

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AQP Examples: Profile Visualization

September 20, 2010
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Two examples of the output from the profile_plot() function, using data from the Sierra Foothill Region, CA. read more

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New R Package ‘aqp’: Algorithms for Quantitative Pedology [updates]

August 9, 2010
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New R Package ‘aqp’: Algorithms for Quantitative Pedology [updates]

  Soils are routinely sampled and characterized according to genetic horizons (layers), resulting in data that are associated with principal dimensions: location (x,y), depth (z), and property space (p). The high dimensionality and grouped nature...

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Updated SoilWeb for the iPhone + Alpha Android Version

June 15, 2010
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Major updates to the SoilWeb iPhone Application. read more

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