Update struct_model.Rmd

change from dataset to data.frame

Author: grlloyd

doc/struct_model.Rmd

@@ -297,8 +297,8 @@ model_template=setClass('model_template', # replace model_template with ...
         params.value_2=20,
         
         # entities can be initialised with populated slots
-        outputs.result_1=entity(name='Result 1',type='dataset',
-            description='An example entity object',value=dataset()),
+        outputs.result_1=entity(name='Result 1',type='data.frame',
+            description='An example entity object',value=data.frame()),
         
         # outputs dont have to be entity objects but we dont recommend this.
         outputs.result_2=2