What is a Perceptron?
A perceptron is a simple binary classifier used in supervised learning, often considered as the simplest form of an artificial neural network. It takes a set of input features, multiplies them by their corresponding weights, sums the products, and then applies an activation function to produce the output. The perceptron algorithm is used for linearly separable binary classification problems.
How does a Perceptron work?
A perceptron works in the following steps:
Initialize the weights and bias to small random values.
For each input example in the training dataset, compute the weighted sum of the input features and the bias.
Apply the activation function (typically a step function) to the weighted sum to obtain the output.
Update the weights and bias based on the difference between the predicted output and the actual output (i.e., the error).
Repeat steps 2-4 for multiple epochs or until convergence.
Limitations of Perceptrons
While perceptrons are simple and easy to implement, they have several limitations:
They can only solve linearly separable problems.
They are sensitive to the order of the training examples.
They do not provide probability estimates for the predicted outcomes.
They are not suitable for complex tasks that require multi-layer neural networks or other advanced machine learning algorithms.