Visualizing High-Dimensional Embeddings with PCA and t-SNE
When working with high-dimensional embeddings—such as 256-dimensional vectors that lie on a hypersphere after training—it's often useful to project them into 2D or 3D space to inspect cluster structure or class separation.
Two widely used techniques for this purpose are Principal Component Analysis (PCA) and t-Distributed Stochastic Neighbor Em ...
Posted on Sat, 20 Jun 2026 17:32:46 +0000 by kusal
Data Collection Strategies and Preprocessing Techniques for Machine Learning
Understanding Data Sources and Collection MechanismsRaw data serves as the foundation for any analytical or machine learning pipeline. Data originates from diverse channels including IoT sensors capturing environmental metrics, web servers logging user interactions, social media platforms generating engagement signals, transactional databases s ...
Posted on Fri, 19 Jun 2026 17:03:48 +0000 by csaba
Mastering Principal Component Analysis for Data Reduction in R
Introduction to Dimensionality Reduction
In data science projects, we often encounter datasets with numerous features. While having many variables can be beneficial, it frequently leads to redundancy where features exhibit high correlation or multicollinearity. This presents significant challenges for analysis. Excessive features contribute to ...
Posted on Wed, 10 Jun 2026 18:31:51 +0000 by StripedTiger
Implementing mRMR Feature Selection in MATLAB
Core Implementation Framework
1. Data Preprocessing Module
% Data standardization (Z-score)
function normalized_data = standardize_features(input_data)
mean_vals = mean(input_data, 1);
std_devs = std(input_data, 0, 1);
normalized_data = (input_data - mean_vals) ./ std_devs;
end
% Discretization process (for continuous features)
fun ...
Posted on Tue, 19 May 2026 15:21:56 +0000 by danieliser