When a machine learning model is trained on a lot of features, it becomes overfitted and more and more reliant on the training data, defeating the purpose by performing poorly on real data.
Avoiding overfitting is a major motivation for performing dimensionality reduction.
We keep hearing about Artificial Intelligence, Machine Learning, Neural Network, and Deep Learning. Do you know their relationship?
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The fewer features our training data has, the fewer assumptions our model makes and the simpler it will be.
Dimensionality reduction has a lot more advantages to offer, like
1. Fewer dimensions mean less computing. Less data means that algorithms train faster.
1. AdaDelta Optimizer: It can be understood as a more robust version of the AdaGrad Optimizer. It was created to address the significant shortcomings of AdaGrad and the RMS prop optimizer and is based on adaptive learning.
RMSprop is a gradient-based optimization technique used in training neural networks. It was proposed by the father of back-propagation, Geoffrey Hinton.
1. Mini Batch Gradient Descent Optimizer: In this variation of gradient descent, only a portion of the dataset is used to calculate the loss function rather than the entire training set.
Stochastic Gradient Descent with Momentum Optimizer: We know that stochastic gradient descent takes a much more noisy path than the gradient descent algorithm.
1. Gradient Descent Optimizer: It is the most basic but most commonly used optimization algorithm.
It is widely used in linear regression and classification algorithms. The gradient descent algorithm is also used in neural network backpropagation.
But what are multi-class classification problems?
Modern machine learning problems involve complex tasks where one has to make the optimal decision given hundreds or thousands of possible actions.
It involves dividing the dataset into different and unique classes based on different parameters so that a new and unseen record can be put into one of the classes.
Mean Absolute Error Loss (MAE): It is defined as the #average of the absolute difference between the actual and predicted values.
It is also known as the L1 loss function.