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Crack the matrix

Visual representations are a great and intuitive way to assess results. One way to visualize and assess the performance of your model is by using a confusion matrix. In this exercise, you will create the confusion matrix of your predicted values to see in which cases it performs well and in which cases it doesn't.

The result of the previous exercise, predictions_combined, is still loaded.

This exercise is part of the course

Machine Learning with Tree-Based Models in R

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Hands-on interactive exercise

Have a go at this exercise by completing this sample code.

# The confusion matrix
diabetes_matrix <- ___(___,
                       ___,
                       ___)

# Print the matrix
___
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