| rpiq {valmetrics} | R Documentation |
rpiq
Description
Calculates the Ratio of interquartile to RMSE (RPIQ) from observed and predicted values.
Usage
rpiq(o, p)
Arguments
o |
A numeric vector. Observed values. |
p |
A numeric vector. Predicted values. |
Details
Interpretation: Smaller is better.
Value
Ratio of interquartile to RMSE (RPIQ)
Author(s)
Kristin Piikki, Johanna Wetterlind, Mats Soderstrom & Bo Stenberg kristin.piikki@slu.se
References
Bellon-Maurel V., Fernandez-Ahumada E., Palagos B., Roger J. M., McBratney, A. 2010. Critical review of chemometric indicators commonly used for assessing the quality of the prediction of soil attributes by NIR spectroscopy. TrAC Trends in Analytical Chemistry, 29(9), 1073-1081.
Piikki K., Wetterlind J., Soderstrom M. Stenberg B. Perspectives on validation in digital soil mapping of continuous attributes. A review. Soil Use and Management, in press.
Examples
obs<-c(1:10)
pred<-c(1, 1 ,3, 2, 4, 5, 6, 8, 7, 10)
rpiq(o=obs, p=pred)