Cross Validation Distribution

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12-15-2021 08:09 AM
ArnieWaddell1
New Contributor III

What does the density on the y-axis measure on the distribution panel on the cross validation screen?  I am trying to compare the measure vs predicted and wondering what the density is referring to.

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EricKrause
Esri Regular Contributor

Hi @ArnieWaddell1 

The graph is showing the distribution each field in the cross validation Table (change the field with the Field pulldown) using a kernel density estimation.  Think of it like a smoothed histogram of the Measured values, Predicted values, or Errors.  

Overlaying the Measured and Predicted fields is the most important use of the Distribution tab.  This lets you compare the distribution of true values and the cross validated predictions.  Ideally, the two should have very similar distributions, and big deviations might indicate problems in the interpolation model.

-Eric

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EricKrause
Esri Regular Contributor

Hi @ArnieWaddell1 

The graph is showing the distribution each field in the cross validation Table (change the field with the Field pulldown) using a kernel density estimation.  Think of it like a smoothed histogram of the Measured values, Predicted values, or Errors.  

Overlaying the Measured and Predicted fields is the most important use of the Distribution tab.  This lets you compare the distribution of true values and the cross validated predictions.  Ideally, the two should have very similar distributions, and big deviations might indicate problems in the interpolation model.

-Eric

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