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--> Clustering Algorithms:
1. K-means: An unsupervised learning method in which we set the value of K, which is the number of Categories/groups.
* it decreases the intra-cluster variance
* it increases the inter-cluster variance
2. Hierarchical Clustering: An unsupervised learning method that checks the similarities concerning major, then minor, and then minor. (the concept of multicollinearity)
3. DBSCAN: An unsupervised learning method that divides data points into clusters based on their density and noise.
4. Gaussian Mixture Models: (GMM) a probabilistic model used in machine learning and statistics to represent the presence of multiple subpopulations within an overall population, even when we don't know which subpopulation an individual data point belongs to. GMM assumes that the data points are generated from a mixture of several Gaussian distributions with unknown parameters.
--> Dimensionality Reduction Algorithms: technique used to find the most useful features from a dataset.
1. Principle Component Analysis (PCA): Tells us about multicolinearity among features.
2. t-SNE (t- distributed Stochastic Neighbour Embedding) it gives us visualizations to identify most useful features based on variances.
* the term t-distribution means the distribution when there are less number of samples)
3. Auto-Encoders: works on neural Networks)
4. SVD (Singular Value Decomposition): converts matrix into single vector.
--> Anomally Dectection Algorithms: (Outlier Detection)
1. Isolation Forest
2. Local Outlier Factor (LOF)
3. One Classs SVM (Support Cector Machines)
4. Associatin Rule Learning
5. Topic Modeling
6. Neural Network Based Model
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unsupervised machine learning introduction done
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Done
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Unsupervised learning starts from this lecture. This lecture contains detail of three types of unsupervised learning algorithms (1) Clustering Algorithms (2) Dimensionality Reduction Algorithms (3) Anomaly Detection Algorithms
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AOA, I did this lecture today.
ALLAH PAK aap ko sahat o aafiyat wali lambi umar ata kray aor ap ko dono jahan ki bhalian naseeb farmaey aur aap ke walid-e-mohtram ko karwat karwat jannat ata farmaye,Ameen.
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done
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Done
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Done
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done
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