Delta Rule vs. Perceptron Training Rule

• Appear identical, but PTR is for thresholded perceptron and DR is for a linear unit (or unthresholed perceptron)
• DR can be used to train a thresholded perceptron, by using as target values to a linear unit, , and having the thresholed unit, .
• If the unthresholed perceptron can be trained to fit these values perfectly then so can the thresholded perceptron
• If the target values cannot be perfectly fit, then the thresholded perceptron will be correct whenever the linear unit has the right sign, but this is not guaranteed to happen