notes of using the earth package with case weights (#992)

Author: topepo

man/details_bag_mars_earth.Rd

@@ -62,6 +62,8 @@ bag_mars(
 ```{r child = "template-uses-case-weights.Rmd"}
 ```
 
+Note that the `earth` package documentation has: "In the current implementation, _building models with weights can be slow_."
+
 ## References
 
  - Breiman, L. 1996. "Bagging predictors". Machine Learning. 24 (2): 123-140

man/details_mars_earth.Rd

@@ -91,6 +91,8 @@ This model can utilize case weights during model fitting. To use them, see the d
 
 The `fit()` and `fit_xy()` arguments have arguments called `case_weights` that expect vectors of case weights. 
 
+Note that the `earth` package documentation has: "In the current implementation, _building models with weights can be slow_."
+
 ## References
 
  - Breiman, L. 1996. "Bagging predictors". Machine Learning. 24 (2): 123-140

man/rmd/bag_mars_earth.Rmd

@@ -55,6 +55,8 @@ An alternate method for using MARs for categorical outcomes can be found in [dis
 ```{r child = "template-uses-case-weights.Rmd"}
 ```
 
+Note that the `earth` package documentation has: "In the current implementation, _building models with weights can be slow_."
+
 ## Saving fitted model objects
 
 ```{r child = "template-butcher.Rmd"}

man/rmd/bag_mars_earth.md

@@ -87,6 +87,8 @@ This model can utilize case weights during model fitting. To use them, see the d
 
 The `fit()` and `fit_xy()` arguments have arguments called `case_weights` that expect vectors of case weights. 
 
+Note that the `earth` package documentation has: "In the current implementation, _building models with weights can be slow_."
+
 ## Saving fitted model objects