Search for tag: "classifier"

FDS-S2-02-2-4 The logistic regression classifier

We show how to make a logistic regression classifier, and, in the context of ethics, consider how transparent logistic regression can be made to people whose lives it affects. We also compare…

From  David Sterratt on January 20th, 2021 0 likes 127 plays 0  

ML5: K-Nearest Neighbours Classification

In this video, we introduce the simplest classifier: the K-Nearest Neighbours classifier. This classifier has no trainable parameters, and classifies test points by finding its closest training…

From  Elliot Crowley on November 9th, 2020 0 likes 8 plays 0  

ML7: Logistic Classification

Here, we introduce a logistic classifier and cover how it differs from a linear classifier. Then, we show how its parameters can be learnt by minimising the cross-entropy loss. Finally, we visualise…

From  Elliot Crowley on November 6th, 2020 0 likes 6 plays 0  

ML6: Linear Classification

In this video, we are introduced to linear classifiers. These have parameters which weight input features, and output a scalar that is used to assign a point to a class. We learn that these…

From  Elliot Crowley on November 5th, 2020 0 likes 6 plays 0  

ML4: An introduction to Classification

Here, we explain what is meant by a (binary) classifier. It is a black box that takes in some data and predicts whether it belongs to one of two possible classes. We also describe how we can split…

From  Elliot Crowley on November 5th, 2020 0 likes 5 plays 0  

Pros and cons of dimensionality reduction

Pros and cons of dimensionality reduction

From  Nigel Goddard on September 25th, 2016 1 likes 2,000 plays 0  

Linear discriminant analysis

Linear discriminant analysis

From  Nigel Goddard on September 25th, 2016 1 likes 1,539 plays 0  

Classification with PCA features

Classification with PCA features

From  Nigel Goddard on September 25th, 2016 1 likes 1,615 plays 0  

Feature selection and feature extraction

Feature selection and feature extraction

From  Nigel Goddard on September 25th, 2016 0 likes 1,965 plays 0  

Evaluating clustering systems

Evaluating clustering systems

From  Nigel Goddard on September 25th, 2016 1 likes 1,951 plays 0  

Sensitivity to outliers

Sensitivity to outliers

From  Nigel Goddard on September 21st, 2016 1 likes 1,694 plays 0  

Number of nearest neighbors to use

Number of nearest neighbors to use

From  Nigel Goddard on September 21st, 2016 1 likes 1,811 plays 0  

Decision Trees are DNF Formulas

Decision Trees are DNF Formulas

From  Nigel Goddard on September 21st, 2016 0 likes 2,476 plays 0  

Receiver Operating Characteristic (ROC) Curve

Receiver Operating Characteristic (ROC) Curve

From  Nigel Goddard on September 21st, 2016 0 likes 2,625 plays 0