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Supervised Machine Learning
Supervised machine learning uses labeled training data to build models that can predict outputs. There are two main types: regression predicts continuous variables, while classification predicts categorical variables. Supervised learning algorithms include linear regression, which finds a linear relationship between variables, and logistic regression or decision trees for classification. The process involves collecting labeled data, training an algorithm on part of the data, and evaluating its accuracy on test data.
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Supervised Machine Learning
- 1. SUPERVISED MACHINE LEARNING Presented By AmalMohanan Livares Technologies Pvt Ltd Tech&Socio-Cultural Group
- 2. Machine learning Continue … Machine learningis a growing technology which enables computers to learn automatically from past data. Machine learning uses various algorithms for building mathematical models and making predictions using historical data or information. Tech&Socio-Cultural Group Livares Technologies Pvt Ltd
- 3. Types of MachineLearning Continue… ⮚ Supervised Machine Learning ⮚ Unsupervised Machine Learning Tech&Socio-Cultural Group Livares Technologies Pvt Ltd
- 4. What is SupervisedLearning? Continue… Supervised learning is the types of machine learning in which machines are trained using well "labelled" training data, and on basis of that data, machines predict the output. In supervised learning, the training data provided to the machines work as the supervisor that teaches the machines to predict the output correctly. It applies the same concept as a student learns in the supervision of the teacher. Tech&Socio-Cultural Group Livares Technologies Pvt Ltd
- 5. How Supervised LearningWorks? Continue… Tech&Socio-Cultural Group Livares Technologies Pvt Ltd
- 6. What is UnsupervisedLearning? Continue… Unsupervised learning is a type of machine learning in which models are trained using unlabeled dataset and are allowed to act on that data without any supervision The goal of unsupervised learning is to find the underlying structure of dataset, group that data according to similarities, and represent that dataset in a compressed format. Tech&Socio-Cultural Group Livares Technologies Pvt Ltd
- 7. Working of UnsupervisedLearning Continue… Tech&Socio-Cultural Group Livares Technologies Pvt Ltd
- 8. Steps Involved inSupervised Learning Continue… ⮚ Determine the type of training dataset ⮚ Collect/Gather the labelled training data. ⮚ Split the training dataset into training dataset, test dataset, ⮚ Determine the suitable algorithm for the model ⮚ Execute the algorithm on the training dataset. ⮚ Evaluate the accuracy of the model by providing the test set. Tech&Socio-Cultural Group Livares Technologies Pvt Ltd
- 9. Types of SupervisedLearning Algorithms Continue… ⮚ Regression Analysis Regression analysis is a statistical method to model the relationship between a dependent (target) and independent (predictor) variables with one or more independent variables. ⮚Classification Algorithm The Classification algorithm is a Supervised Learning technique that is used to identify the category of new observations on the basis of training data. Tech&Socio-Cultural Group Livares Technologies Pvt Ltd
- 10. Types Regression Analysis Continue… ⮚Linear Regression Linear relationship between dependent and independent variables ⮚ Polynomial Regression Non linear relationship between dependent and independent variables Tech&Socio-Cultural Group Livares Technologies Pvt Ltd
- 11. Types Regression Analysis Continue… Tech&Socio-Cultural Group LivaresTechnologies Pvt Ltd
- 12. Linear Regression Continue… Linear regressionalgorithm shows a linear relationship between a dependent (y) and one or more independent (x) variables, hence called as linear regression. Since linear regression shows the linear relationship, which means it finds how the value of the dependent variable is changing according to the value of the independent variable Tech&Socio-Cultural Group Livares Technologies Pvt Ltd
- 13. Assumptions of LinearRegression Continue… Tech&Socio-Cultural Group Livares Technologies Pvt Ltd
- 14. Types of LinearRegression Analysis Continue… ▪ Simple Linear Regression ▪ Multiple Linear Regression Tech&Socio-Cultural Group Livares Technologies Pvt Ltd
- 15. Simple Linear Regression Continue… SimpleLinear Regression is a type of Regression algorithms that models the relationship between a dependent variable and a single independent variable. The relationship shown by a Simple Linear Regression model is linear or a sloped straight line, hence it is called Simple Linear Regression. Equation y = b0 + b1x b0 = It is the intercept of the Regression line b1 = It is the slope of the regression line, which tells whether the line is increasing or decreasing. Tech&Socio-Cultural Group Livares Technologies Pvt Ltd
- 16. Multiple Linear Regression Continue… MultipleLinear Regression is one of the important regression algorithms which models the linear relationship between a single dependent continuous variable and more than one independent variable. Equation y = b0 + b1x1 + b2x2 + b3x3 +….. b0,b1.b2,…. = Coefficients of the model x1, x2, x3, x4,...= Various Independent/feature variable Tech&Socio-Cultural Group Livares Technologies Pvt Ltd
- 17. Backward Elimination Continue… Backward eliminationis a feature selection technique while building a machine learning model. It is used to remove those features that do not have a significant effect on the dependent variable or prediction of output. There are various ways to build a model in Machine Learning, which are: ⮚ All-in ⮚ Backward Elimination ⮚ Forward Selection ⮚ Bidirectional Elimination ⮚ Score Comparison Tech&Socio-Cultural Group Livares Technologies Pvt Ltd
- 18. Steps of BackwardElimination Continue… Step-1: Firstly, We need to select a significance level to stay in the model. (SL=0.05) Step-2: Fit the complete model with all possible predictors/independent variables Step-3: Choose the predictor which has the highest P-value, such that. 1. If P-value >SL, go to step 4. 2.Else Finish, and Our model is ready. Step-4: Remove that predictor. Step-5: Rebuild and fit the model with the remaining variables. Tech&Socio-Cultural Group Livares Technologies Pvt Ltd
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