You can compare three or more algorithms to discover the best one to solve a predictive
problem in all scenarios (HANA and non-HANA). However, when your analysis has three or more
algorithms, you cannot add a child node to perform further fine-grained
analysis.
Prerequisites: It is mandatory to use the Model Statistics and
Partition components with the Model
Compare component to create your model comparison chain.
Take the following steps to compare three or more algorithms:
- In Expert Analytics, connect to a Data Source and navigate to the
Predict room.
- Drag-and-drop a Partition component to the analysis
editor.
- In the Algorithms section, drag-and-drop selected three or more algorithms to
the analysis editor.
- Add to the analysis chain the appropriate Model Statistics and
Model Compare components.
- Drag-and-drop the Model Compare component that you added
to the analysis editor over all of the Model
Statistics components that you want to compare.
Note After dragging-and-dropping the
Model Compare component over the
third
Model Statistics component, the
Model
Compare will become a terminal (or leaf) component in a
chain because the component has three parents. Be aware that you cannot
perform further analysis on a terminal component. The component displays the
following icon when comparing three or more components:
- Name the columns that result from the mapping for the child component to use. Optionally,
you can add or remove other columns of the same type. To map all other columns,
manually add the additional rows.
Note
The data in the mapped columns comes from the winning component. None
of the columns in the configuration window can be empty.
You can now use the Partition, Model Statistics and Model Comparison components to compare
three or more algorithms to solve a complex analysis.