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Hello all -<br>
<br>
On page 46 of the BIOMOD manual it says:<br>
<br>
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<font size="3"><span style="font-family: Times New Roman;">To display the predictive accuracy by Roc of the GLM for the second species modelled</span><br style="font-family: Times New Roman;">
</font><br>
<font size="2"><span style="font-family: Courier New;">> Evaluation.results.Roc$Sp277_PA1["GLM",]<br>
<br style="font-family: Courier New;">
</span><span style="font-family: Courier New;"> Cross.validation indepdt.data total.score Cutoff Sensitivity
</span></font><font size="2"><span style="font-family: Courier New;">Specificity</span></font><font size="2"><span style="font-family: Courier New;"></span><br style="font-family: Courier New;">
<span style="font-family: Courier New;">GLM 0.996 0.889 0.997 547.452 96.852</span><span style="font-family: Courier New;"></span><span style="font-family: Courier New;"> 96.906</span></font><br>
<br>
<font size="3"><span style="font-family: Times New Roman;">As you can see the GLM has a high predictive accuracy on this particular species. The fairly</span><br style="font-family: Times New Roman;">
<span style="font-family: Times New Roman;">small decrease of accuracy from the Calibration to the Evaluation is an indication that the model</span><br style="font-family: Times New Roman;">
<span style="font-family: Times New Roman;">does not tend to over?t the data</span></font>.<br>
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<br>
I understand that the "Evaluation" parameter referred to is the Cross.validation score. I am assuming the "Calibration" parameter refers to the total.score. However, if so, I am confused by that, since my understanding is that the total score is based on
either the "final model" (in this case, since it is not a rep) or the combination of the calibration & evaluation data sets (in the case of reps)...both of which use or include 100% of the data.<br>
<br>
Similarly, in a 2009 GEB article by Coetzee et al. using BIOMOD, they provided a Table (1) showing AUC and TSS statistics (mean, min and max) for "Calibration", "Evaluation" and "Original (Calibration + Evaluation)" for their models. If someone could clarify
how those categories correspond with the evaluation output in BIOMOD that would be very helpful.<br>
<br>
Thanks!<br>
Brenna Forester<br>
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