Simple Exponential Smoothing (SES) is a time series forecasting method that is especially suitable for univariate data without a trend or seasonal pattern. It uses weighted averages of past observations to forecast future points. The method is ‘exponential’ because the weights decrease exponentially as observations get older. Key Concept: Smoothing…
Reinforcement Learning (RL) is a bit unique. It’s not like supervised learning where we have labeled data to guide the learning. But it’s also not unsupervised learning where the algorithm is left to find patterns on its own. In RL, we don’t give direct answers, but we do give feedback…
NLP, or Natural Language Processing, is a field at the intersection of computer science, artificial intelligence, and linguistics. Its goal is to enable computers to understand, interpret, and generate human languages in a way that is both meaningful and useful. Key Challenges in NLP: Ambiguity: Natural language is often ambiguous,…
Here’s the tabular comparison with K-means, Hierarchical Clustering, and DBSCAN in the requested order: Aspect K-means Hierarchical Clustering DBSCAN Clustering Approach Partitioning Agglomerative or Divisive Density-based Shape of Clusters Spherical, equally sized Various shapes (depends on linkage) Arbitrary shapes Number of Clusters Requires specifying K beforehand No predefined K required…
Data clustering is a fundamental technique in the field of data science and machine learning. It involves grouping data points that are similar to each other. While many clustering algorithms exist, Density-Based Spatial Clustering of Applications with Noise (DBSCAN) stands out as a robust method that can identify clusters of…
k-means clustering, like many machine learning algorithms, has hyperparameters that need to be set prior to running the algorithm. These hyperparameters affect how the algorithm works and can impact the quality of the clustering results. Here are some common hyperparameters in k-means: Number of Clusters (k): Perhaps the most crucial…
Clustering is one of the most common exploratory data analysis techniques used to get an intuition about the structure of the data. K-means clustering is one of the simplest and most popular unsupervised machine learning algorithms. k-Means Clustering is an algorithm that, given a dataset, will identify which data points belong to…
K-NN stands for K-Nearest Neighbors, and it’s a type of learning method where the algorithm doesn’t really “train” the data in the usual way. Instead, it memorizes instances from the training dataset and uses these instances directly to make predictions. It is known as “lazy learning”. It is a type…
In machine learning, handling missing values is a common challenge. Not all algorithms can handle missing values naturally, but some have been designed or adapted to do so. Here’s an explanation of a few such algorithms: Decision Trees and Random Forests: Decision trees inherently handle missing values. During training, if…
A support vector machine (SVM) is a supervised machine learning model which can be used for both classification and regression. But they have been extensively used for solving complex classification problems such as image recognition, voice detection etc. SVM algorithm outputs an optimal hyperplane that best separates the tags. The hyperplane is a boundary that…