# Common Machine learning models

Machine learning models can be grouped based on their characteristics, underlying algorithms, and the types of tasks they are designed to solve. Here are some common groupings of machine learning models:

### 1. **Supervised Learning Models:**

**Description:**Models trained on labeled datasets, where the algorithm learns the mapping between input features and corresponding target labels.**Examples:**- Linear Regression
- Logistic Regression
- Decision Trees
- Support Vector Machines (SVM)
- K-Nearest Neighbors (KNN)
- Neural Networks

### 2. **Unsupervised Learning Models:**

**Description:**Models trained on unlabeled datasets, seeking to discover patterns, structures, or relationships within the data.**Examples:**- K-Means Clustering
- Hierarchical Clustering
- Principal Component Analysis (PCA)
- Gaussian Mixture Models (GMM)
- t-Distributed Stochastic Neighbor Embedding (t-SNE)

### 3. **Ensemble Models:**

**Description:**Techniques that combine multiple base models to improve overall performance and robustness.**Examples:**- Random Forest (ensemble of decision trees)
- Gradient Boosting Machines (e.g., XGBoost, LightGBM)
- AdaBoost
- Bagging (Bootstrap Aggregating)
- Stacking

### 4. **Regression Models:**

**Description:**Models designed for predicting continuous numerical values.**Examples:**- Linear Regression
- Lasso Regression
- Ridge Regression
- Support Vector Regression (SVR)
- Decision Trees (for regression)

### 5. **Classification Models:**

**Description:**Models designed for predicting categorical labels or classes.**Examples:**- Logistic Regression
- Decision Trees (for classification)
- Support Vector Machines (SVM)
- Random Forest (ensemble of decision trees)
- Neural Networks

### 6. **Clustering Models:**

**Description:**Models focused on grouping similar data points together based on inherent patterns.**Examples:**- K-Means Clustering
- Hierarchical Clustering
- DBSCAN (Density-Based Spatial Clustering of Applications with Noise)

### 7. **Dimensionality Reduction Models:**

**Description:**Techniques that reduce the number of features in a dataset while retaining important information.**Examples:**- Principal Component Analysis (PCA)
- t-Distributed Stochastic Neighbor Embedding (t-SNE)
- Autoencoders

### 8. **Time Series Models:**

**Description:**Models designed to analyze and predict time-ordered data points.**Examples:**- Autoregressive Integrated Moving Average (ARIMA)
- Exponential Smoothing State Space Models (ETS)
- Long Short-Term Memory (LSTM) networks

### 9. **Natural Language Processing (NLP) Models:**

**Description:**Models specialized in understanding and processing human language.**Examples:**- Bag-of-Words models
- Word Embeddings (e.g., Word2Vec, GloVe)
- Transformer Models (e.g., BERT, GPT)

### 10. **Recommender Systems:**

Description:Models designed to recommend items or content to users based on their preferences or behavior.

Examples: Collaborative Filtering – Content-Based Filtering – Hybrid Recommender Systems

These groupings provide a high-level categorization of machine learning models. Within each group, there can be variations and combinations of algorithms tailored to specific tasks and challenges. The choice of model depends on the characteristics of the data and the objectives of the machine learning project.