Model Evaluation and Analysis
The modEvA package can analyse species distribution models and evaluate their performance. It includes functions for performing variation partitioning; calculating several measures of model discrimination, classification, explanatory power, and calibration; optimizing prediction thresholds based on a number of criteria; performing multivariate environmental similarity surface (MESS) analysis; and displaying various analytical plots.
Package: | modEvA |
Type: | Package |
Version: | 2.0 |
Date: | 2020-01-21 |
License: | GPL-3 |
Barbosa A.M., Brown J.A., Jimenez-Valverde A., Real R.
A. Marcia Barbosa <ana.marcia.barbosa@gmail.com>
Barbosa A.M., Real R., Munoz A.R. & Brown J.A. (2013) New measures for assessing model equilibrium and prediction mismatch in species distribution models. Diversity and Distributions 19: 1333-1338 (DOI: 10.1111/ddi.12100)
PresenceAbsence, ROCR, verification
# load sample models: data(rotif.mods) # choose a particular model to play with: mod <- rotif.mods$models[[1]] # plot this model: plotGLM(model = mod) # calculate the area under the ROC curve for the model: AUC(model = mod) # calculate some threshold-based measures for this model: threshMeasures(model = mod, thresh = 0.5) threshMeasures(model = mod, thresh = "preval") # calculate optimal thresholds based on several criteria: optiThresh(model = mod, measures = c("CCR", "Sensitivity", "kappa", "TSS"), ylim = c(0, 1)) # calculate the optimal threshold balancing two evaluation measures: optiPair(model = mod, measures = c("Sensitivity", "Specificity")) # calculate the explained deviance, Hosmer-Lemeshow goodness-of-fit, # Miller's calibration stats, and (pseudo) R-squared values for the model: Dsquared(model = mod) HLfit(model = mod, bin.method = "quantiles") MillerCalib(model = mod) RsqGLM(model = mod) # calculate a bunch of evaluation measures for a set of models: multModEv(models = rotif.mods$models[1:4], thresh = "preval", bin.method = "quantiles")
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