Questions tagged [cross-validation]

a statistical method of evaluating and comparing learning algorithms.

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1answer
563 views

Difference between Bootstrap and Cross Validation MaxEnt

I didn't know which method to use cross-validation or bootstrap in maxent so I ran both and my AUC values for each method are quite different for bootstrap I have an AUC of 0.758 and for cross ...
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1answer
160 views

R function krige.cv() returns NAs

I recently completed a geostatistics course, and now trying to apply my knewly acquired knowledge to a real case. I have a dataset with 2 122 groundwater level measurement points. I would like to ...
1
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0answers
27 views

Measure of isolation (better than distance to the closest)

I have square locations (see image). For my SDM, I need some measure of isolation of a square (related to the other squares or a particular specified set of squares). The most simple one would be to ...
0
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1answer
425 views

Cross-validating kriging results using gstat R from hyperparameter [closed]

I have a large dataset that doesn't require kriging (it would take too much time to compute anyways). But I'm interested to find the optimal number of samples that would be sufficient in order to ...
1
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1answer
328 views

how to predict on hold on test sample using krige.cv from gstat R toolbox?

I am using the 'krige.cv' function from the gstat toolbox in R. It does not take any 'newdata' as input for prediction ( as in universal kriging). How can I predict using the fitted model from this ...
2
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1answer
1k views

R kriging cross validation returns NA for all prediction points?

I'm trying to cross-validate the results of an [auto]Krige output but for some unknown reason the results of both autoKrige.cv (automap package) and krige.cv (gstat package) return NA for all values (...
1
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0answers
65 views

Cross-validation error threshold in ArcGIS

I'm learning the Geostatistical Wizard toolset in ArcMap 10.4.1 and I am performing the cross-validation step in an IDW interpolation. I have done some research regarding the process of cross-...
1
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2answers
883 views

Specifying the "idp" and the "nmax" in the krige.cv function

I'm performing IDW interpolation using the idw R function from the gstat package. For the purpose of determining what combination of "idp" and "nmax" produces the lowest RMSE in leave-one-out-cross ...
0
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1answer
269 views

Cross validation in thiessen polygons interpolation

I apply Thiessen Polygons interpolation using the krige command in the gstat R package. Using krige without a variogram model sets automatically krige function to perform IDW, and when nmax parameter ...
3
votes
1answer
6k views

IDW in R with cross validation

I want to perform IDW interpolation using R, and more specifically, using the idw command from the gstat package. Also, I want to use the optimal number of neighbors (point locations) and distance ...
1
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0answers
623 views

Cross validation after kriging, in ArcGIS

I performed kriging interpolation using the kriging interpolation tool in ArcToolbox, not the Geostatistical Wizard method. However, how do I determine the cross validation without using the ...