Dris {mffSM} | R Documentation |
Data on chemical composition of solids in 368 grain leafs obtained during the growing season and later identified grain yields.
Data are used for some illustrations in the book Regrese by Karel Zvára (Zvára, 2008). Originally, data were obtained thanks to a generous kindness of prof. Lubomír Nátr (Faculty of Science, Charles University in Prague). DRIS stands for Diagnosis and Recommendation Integrated System.
data(Dris)
A data.frame
with 368 rows and the following variables.
yield
nitrogen content
phosphorus content
potassium content
calcium content
magnesium content
http://msekce.karlin.mff.cuni.cz/~zvara/regrese/kniha/R.ZIP
Zvára, K. (2008). Regrese. Praha: Matfyzpress. ISBN 978-80-7378-041-8.
data(Dris) summary(Dris)