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User Request – Shepards Classification of Sediments

I received a request overnight on how to render the Shepard’s classification diagram, which is an

New Geometry – Ternary Errorbars

ggtern 1.0.3.1 has introduced a new series of geometries to represent known errors in data, they

USDA Textural Soil Classification


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Included in the next version (1.0.3.1) of ggtern, will be a new data set, taken from