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Implement perceptron for the adult income dataset using Python.

Task

Predict whether income exceeds $50K/yr based on census data. Also known as "Census Income" dataset.

First column is class label, remaining columns are a sparse representation of the feature vector in format :. All other features are 0.

more information on the task: http://archive.ics.uci.edu/ml/datasets/Adult

preprocessed version from: http://www.csie.ntu.edu.tw/~cjlin/libsvmtools/datasets/binary.html

Also, experiment with performance as a function of number of iterations.

Files

"Perceptron.py" contains the code for the perceptron algorithm. "README.md"

Algorithm

Perceptron algorithm for the adult income dataset is implemented using Python.

Instructions for running "Perceptron.py"

To run the script "Perceptron.py" type "python3 Perceptron.py" The default number of iterations is 10 and it will use the dev set.

We can also specify the number of iterations to run using the optional argument "--iterations" and whether to use the dev set or not using the optional argument "--nodev"

Output

Reading file: adult/a7a.train Running Perceptron... Iteration: 1 Iteration: 2 Iteration: 3 Iteration: 4 Iteration: 5 Iteration: 6 Iteration: 7 Iteration: 8 Iteration: 9 Iteration: 10 Reading file: adult/a7a.dev Accuracies on dev set: [0.7875, 0.81675, 0.80025, 0.783125, 0.802875, 0.809375, 0.809375, 0.81025, 0.74875, 0.819125] Reading file: adult/a7a.test Test accuracy: 0.8124335184966316 Feature weights (bias last): -6.0 -3.0 4.0 3.0 -2.0 0.0 -1.0 6.0 10.0 1.0 1.0 -6.0 0.0 -9.0 3.0 4.0 -2.0 0.0 -2.0 -1.0 0.0 -1.0 1.0 -1.0 3.0 1.0 -5.0 7.0 -1.0 2.0 1.0 7.0 -3.0 -12.0 -9.0 -1.0 -1.0 2.0 5.0 8.0 -4.0 -5.0 -6.0 -1.0 -6.0 10.0 2.0 0.0 0.0 3.0 8.0 -1.0 0.0 2.0 0.0 -5.0 -3.0 -2.0 7.0 0.0 5.0 -1.0 -4.0 0.0 -3.0 -1.0 0.0 4.0 -2.0 -3.0 -3.0 -4.0 0.0 -7.0 3.0 -7.0 3.0 -5.0 -1.0 -3.0 2.0 3.0 5.0 8.0 4.0 -5.0 8.0 -2.0 0.0 -9.0 5.0 -1.0 -1.0 -4.0 5.0 -1.0 0.0 4.0 5.0 4.0 2.0 -10.0 -1.0 -3.0 8.0 0.0 -5.0 -2.0 12.0 -3.0 0.0 -8.0 -6.0 3.0 5.0 6.0 -6.0 12.0 2.0 -4.0 -8.0 -3.0 0.0 -4.0

References

This was done as a homework problem in the Machine Learning class (CSC 446, Spring 2018) by Prof. Daniel Gildea at the University of Rochester, New York.
Have questions? Shoot me an email.

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Demo of the Perceptron learning algorithm.

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