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Regression models are tested by comparing the predicted values to known target values in a set of test data. The historical data for a regression project is typically divided into two data sets: one for building the model and one for testing the model.
The test data must be compatible with the data used to build the model and must be prepared in the same way that the build data was prepared.
These are the ways to test classification and regression models:
The default is to split the input data into build data and test data.
You can use all of the build data as test data.
Attach two data source nodes to the build node. The first data source that you connect to the build node is the source of build data; the second node that you connect is the source of test data.
Unselect Perform Test on the test tab and use a Test Node.
The test tab defines how tests are done. The default is to test all models built.
By default, the test data is created by randomly splitting the build data into two subsets; 40% if the input data is used for the test set. You can also use all of the build data for testing.
Test settings specify which metrics to calculate and control the calculation of the metrics.
Oracle Data Mining provides several kinds of information to assess regression models:
To view test results, first test the model or models in the node:
If you tested the models using the default test in the regression node, run the node and then right-click the node. Select View Test Results and select the model that you are interest in. The Regression Model Test Viewer launches. To compare the test results for all models in the node, select Compare Test Results.
If you tested the models using a Test node, run the Test node and then right-click the node. Select View Test Results and select the model that you are interested in. The Regression Model Test Viewer launches. To compare the test results for all models in the node, select Compare Test Results.
You can also compare test results by going to the Models section of Properties of the Build node where you tested the models and clicking