topic Forest-Based regression with non-normally distributed data? in ArcGIS GeoStatistical Analyst Questions https://community.esri.com/t5/arcgis-geostatistical-analyst-questions/forest-based-regression-with-non-normally/m-p/1173980#M1773 <P>Does anyone know how robust the Forest-Based regression is to non-normally distributed data? I've tried every data transformation possible and settled with a square root transformation which turned out to be the "least unsuccessful transformation. The subsequent model was still able to get a good R2 of 0.91, but I'm wondering how robust/sensitive the forest-based algorithm is.</P> Sat, 14 May 2022 03:04:57 GMT JustinLee 2022-05-14T03:04:57Z Forest-Based regression with non-normally distributed data? https://community.esri.com/t5/arcgis-geostatistical-analyst-questions/forest-based-regression-with-non-normally/m-p/1173980#M1773 <P>Does anyone know how robust the Forest-Based regression is to non-normally distributed data? I've tried every data transformation possible and settled with a square root transformation which turned out to be the "least unsuccessful transformation. The subsequent model was still able to get a good R2 of 0.91, but I'm wondering how robust/sensitive the forest-based algorithm is.</P> Sat, 14 May 2022 03:04:57 GMT https://community.esri.com/t5/arcgis-geostatistical-analyst-questions/forest-based-regression-with-non-normally/m-p/1173980#M1773 JustinLee 2022-05-14T03:04:57Z Re: Forest-Based regression with non-normally distributed data? https://community.esri.com/t5/arcgis-geostatistical-analyst-questions/forest-based-regression-with-non-normally/m-p/1177633#M1774 <P><a href="https://community.esri.com/t5/user/viewprofilepage/user-id/113929">@JustinLee</a>&nbsp;Great question!&nbsp; Forest-based Classification and Regression does not make any normal distribution assumption about the data.&nbsp; Generally speaking, outliers and extreme values will be most problematic for the model.&nbsp; Ideally, you'll have a roughly even spread of values between the minimum and maximum, but there's no requirement that the distribution be bell-shaped.</P> Thu, 26 May 2022 17:32:37 GMT https://community.esri.com/t5/arcgis-geostatistical-analyst-questions/forest-based-regression-with-non-normally/m-p/1177633#M1774 EricKrause 2022-05-26T17:32:37Z