Description Usage Details References Examples
cbi.results
is a list which stores output of the continuous Boyce classification performed with boyce
.
1 |
Source dataset refers to classification of the niche analysis performed on apis.enirg
data.
Boyce, M.S.,Vernier, P.R.,Nielsen,S.E.,Schmiegelow, F.K.A. (2002). Evaluating resource selection functions. Ecological Modelling 157, 281-300.
Fielding, A., Bell, J. (1997). A review of methods for the assessment of prediction errors in conservation presence/absence models. Environmental Conservation, 24, 38-49.
Hirzel, A.H., Le Lay, G., Helfer, V., Randin, C., Guisan, A. (2006). Evaluating the ability of the habitat suitability models to predict species presences. Ecological Modelling 199, 142-152.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | data(apis.hsm)
# vector of predictions for observations:
apis.predictions <- apis.hsm$predictions[, 2]
# vector of predictions for the entire predicted map:
apis.predictions.map <- as.vector(na.exclude(apis.hsm$African_predicted_hsm@data@values))
# Try with intervals:
# unsuitable = 0.65
# marginal = 0.84
# suitable = 0.96
# Note that this species has an optimal distribution
# in the study area, resulting in a wide unsuitable
# interval and narrow suitable ones.
boyce(prediction = apis.predictions,
prediction.map = apis.predictions.map,
categories = c(0, 0.65, 0.84, 0.96, 1),
cv.sets = 10, type = "none")
data(cbi.results)
cbi.results
|
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