Questions tagged [cross-validation]
a statistical method of evaluating and comparing learning algorithms.
15 questions
1 vote
0 answers
187 views
How to properly use BlockCV method of cross validation in dismo MaxEnt model in R?
This is what I have right now, but the model looks exactly the same as it does without the cross validation. The .html it spits out has no "training" data in the ROC curve or sensitivity ...
2 votes
0 answers
486 views
Google Earth Engine k-fold cross-validation
I wrote a script for Google Earth Engine that allows me to analyze geospatial data. Initially, I loaded three data sets: a predictor shapefile, a forecast area shapefile, and a collection of landslide ...
0 votes
1 answer
50 views
Interpreting r.regression.multi
I cannot find a source that explains how to interpret the output of r.regression.multi. Can someone explain what the different lines mean; specifically how do I see if the results are significant? X=...
- 15
0 votes
1 answer
133 views
Residual bubble plot of krige.cv function dataframe
I want to plot a bubble plot of residuals from the krige.cv function with the bubble function. However I get an error: Error in as(obj, "SpatialPointsDataFrame") : no method or default for ...
- 161
2 votes
1 answer
2k 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 ...
0 votes
1 answer
464 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 ...
- 828
1 vote
0 answers
42 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 ...
- 1,358
0 votes
1 answer
1k 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 ...
- 13
1 vote
1 answer
493 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 ...
- 151
2 votes
1 answer
2k 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 (...
- 173
1 vote
0 answers
116 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-...
- 115
1 vote
2 answers
2k 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 votes
1 answer
361 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 ...
- 1,470
3 votes
1 answer
7k 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 ...
- 1,470
1 vote
0 answers
728 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 ...
- 55