| 03 February 2000 | Non-linear classification |
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MLPfit Interfaces More info |
This example consists in separating signal and background arranged in two interlocking spirals, as shown on the figure:
In 1988, it was thought impossible to solve this problem with a Multi-Perceptron with one hidden layer , at least in practice (1). With MLPfit, the problem can be solved,for example, with a 2-30-1 network trained with the hybrid learning method for 1000 epochs. This takes less than 5 minutes. The result is shown in the following figure, where red areas correspond to the MLP output lower than 0.5, green areas to the output greater than 0.5
You can download the data here. Try it yourself ! (1) K.J.Lang and M.J.Witbrock. Learning to tell two spirals apart. In D.S. Touretzky et al., editors, Proceedings of the 1988 Connectionists Models, pages 52-59, 1988. |
