Author

Ujang Riswanto

@ujangriswanto08

articles: 42
total claps: 36
top claps: 32
avg read: 9.5 min
active: 2023-04-17 → 2026-07-17

Wiki topics

💻 · Programming · 21 ML · Machine Learning · 18 EDU · Education & Learning · 13 AI · AI · General · 9 AGT · AI Agents · 6 RAG · RAG & Retrieval · 2 GEN · Genomics & Sequencing · 2 ✍️ · Writing & Creative · 1

Top tags

#latent-dirichlet ·9 #reinforcement-learning ·9 #step-by-step-guide ·8 #python-programming ·8 #artificial-intelligence ·8 #machine-learning ·8 #r-programming ·4 #decision-tree ·4 #multi-agent ·4 #deep-learning ·4

AI HUM TCH

UJ Ujang Riswanto

What is SARSA? Understanding the On-Policy Learning Algorithm

Discover the Fundamentals of SARSA, the On-Policy Reinforcement Learning Algorithm Used to Learn Optimal Actions

Jun 17, 2026 · 7 min read · 32 claps #sarsa #reinforcement-learning #machine-learning

What is SARSA? Understanding the On-Policy Learning Algorithm

AI HUM

UJ Ujang Riswanto

How PILCO Bridges the Gap Between Model-Based and Model-Free RL

A beginner-friendly exploration of how PILCO combines the efficiency of model-based reinforcement learning with the flexibility of…

May 18, 2026 · 7 min read · 2 claps #reinforcement-learning #artificial-intelligence #machine-learning

AI TCH

UJ Ujang Riswanto

Step-by-Step Guide to Building Neural Networks in Python (or R)

Neural networks are the backbone of modern AI, powering everything from image recognition to natural language processing. But if you’re…

Jul 18, 2025 · 15 min read · 1 claps #step-by-step-guide #neural-networks #neural-network-algorithm

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UJ Ujang Riswanto

Mastering SARSA: Step-by-Step Implementation in Python

A Practical Beginner-to-Intermediate Guide for Building, Training, and Evaluating SARSA Agents Using Python

Jun 18, 2026 · 6 min read · 1 claps #sarsa #reinforcement-learning #machine-learning

Mastering SARSA: Step-by-Step Implementation in Python

AI TCH SCI

UJ Ujang Riswanto

Step-by-Step Guide to Building Decision Trees with C4.5

If you’ve ever dealt with decision-making processes (whether in real life or in data science), you’ve probably come across decision trees…

Jun 02, 2025 · 18 min read · 0 claps #decision-tree #decision-tree-algorithm #c45

Step-by-Step Guide to Building Decision Trees with C4.5

TCH

UJ Ujang Riswanto

Step-by-Step Implementation of Labeled LDA in Python (or R)

LLDA is your friend when you want topic modeling that actually respects the categories you already have.

Nov 13, 2025 · 16 min read · 0 claps #step-by-step-guide #labeled-lda #lda

Step-by-Step Implementation of Labeled LDA in Python (or R)

TCH

UJ Ujang Riswanto

Step-by-Step Implementation of sLDA in Python

If you’ve played around with Latent Dirichlet Allocation (LDA) before, you probably know it’s great at finding hidden themes in text — like…

Nov 26, 2025 · 16 min read · 0 claps #step-by-step-guide #supervised-lda #latent-dirichlet

Step-by-Step Implementation of sLDA in Python

UJ Ujang Riswanto

Cracking the Code of Sparse Data with Elastic Net Regression

Elastic Net is powerful, but it’s not a black box. With a little care and attention to detail, you can make it work wonders on even the…

Nov 24, 2024 · 15 min read · 0 claps #sparse-data #elastic-net-regression

TCH

UJ Ujang Riswanto

Step-by-Step Implementation of Sparse LDA in Python or R

Sparse LDA is like turning down the background noise in your topic model so the main voices come through loud and clear

Dec 01, 2025 · 14 min read · 0 claps #step-by-step-guide #sparse-lda #latent-dirichlet

TCH

UJ Ujang Riswanto

Step-by-Step Guide to Building Decision Trees with ID3

Ever wondered how machines make decisions, just like humans? Well, that’s where decision trees come into play! They’re one of the simplest…

May 28, 2025 · 14 min read · 0 claps #gui̇de #decision-tree #decision-tree-algorithm

Step-by-Step Guide to Building Decision Trees with ID3

AI SCI

UJ Ujang Riswanto

Understanding the Math Behind Multivariate Logistic Regression

Multivariate logistic regression isn’t just about crunching numbers — it’s about making data-driven decisions.

Apr 09, 2025 · 14 min read · 0 claps #math #multivariate #multivariate-regression

Understanding the Math Behind Multivariate Logistic Regression

AI TCH

UJ Ujang Riswanto

The Role of Neural Networks in Natural Language Processing

Neural networks have revolutionized how we interact with language — making AI smarter, more human-like, and incredibly useful.

Jul 21, 2025 · 13 min read · 0 claps #neural-networks #neural-network-algorithm #naturallanguageprocessing

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UJ Ujang Riswanto

Building Interpretable Models with ID3 Decision Trees

Imagine you’re trying to explain a big decision to someone — like choosing a new phone. You might break it down into questions: “Do I want…

May 29, 2025 · 13 min read · 0 claps #model #id3 #id3-algorithm

Building Interpretable Models with ID3 Decision Trees

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UJ Ujang Riswanto

What is C4.5? Understanding the Evolution of Decision Trees

It made decision trees practical for real-world use, inspired new algorithms, and is still a great learning tool for beginners.

Jun 01, 2025 · 13 min read · 0 claps #c45 #decision-tree

What is C4.5? Understanding the Evolution of Decision Trees

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UJ Ujang Riswanto

Agglomerative Hierarchical Clustering for Genomic and Biological Data

AHC is like a trusty Swiss Army knife for biological data — especially when you’re trying to make sense of complex patterns or uncover…

Aug 27, 2025 · 12 min read · 0 claps #agglomerative-clustering #clustering-algorithm #genomics

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UJ Ujang Riswanto

Step-by-Step Implementation of Ester’s DBSCAN in Python (or R)

Let’s talk clustering — no, not your messy desktop folders, but the kind where we group similar data points together without any labels…

Sep 08, 2025 · 12 min read · 0 claps #step-by-step-guide #ester #dbscan

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UJ Ujang Riswanto

Step-by-Step Guide to Implementing CTM in Python (or R)

If you’ve ever played around with topic modeling, chances are you’ve heard of LDA (Latent Dirichlet Allocation) — the classic algorithm…

Nov 10, 2025 · 12 min read · 0 claps #step-by-step-guide #ctm #correlated-topic-model

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UJ Ujang Riswanto

Step-by-Step Implementation of Multivariate Logistic Regression in R with caret

Ever wondered how businesses predict customer behavior or how doctors determine the likelihood of a patient having a disease? That’s where…

Apr 21, 2025 · 12 min read · 0 claps #multivariate-regression #implementation #logistic-regression

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UJ Ujang Riswanto

Challenges and Solutions in Using Ester’s Standard DBSCAN

If you’ve ever tried clustering data, you’ve probably come across DBSCAN — that’s short for Density-Based Spatial Clustering of…

Sep 09, 2025 · 11 min read · 0 claps #ester #dbscan #dbscan-algorithm

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UJ Ujang Riswanto

What Are Neural Networks? Breaking Down the Basics of AI

Neural network takes in data, processes it layer by layer, makes a decision, and then learns from its mistakes to improve over time.

Jul 17, 2025 · 11 min read · 0 claps #neural-networks #neural-network-algorithm #ai

UJ Ujang Riswanto

Challenges and Solutions in Applying Correlated Topic Models to Large Datasets

CTM may be more demanding than LDA, but with the right tools and workflow, it can take your text analysis to a whole new level.

Nov 11, 2025 · 10 min read · 0 claps #challenge #solutions #ctm

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UJ Ujang Riswanto

Why Use ID3? Exploring the Algorithm’s Strengths and Weaknesses

ID3 is great for simple, structured datasets, but it struggles when things get messy.

May 27, 2025 · 10 min read · 0 claps #id3 #id3-algorithm

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UJ Ujang Riswanto

Exploring the Role of C4.5 in Ensemble Methods Like Random Forests

C4.5 is a solid, well-rounded decision tree algorithm that handles missing data, supports categorical and continuous features, and includes…

Jun 03, 2025 · 9 min read · 0 claps #c45 #ensemble-method #random-forest

Exploring the Role of C4.5 in Ensemble Methods Like Random Forests

UJ Ujang Riswanto

What is Supervised LDA? A Beginner’s Guide to Predictive Topic Modeling

Whenever you’ve got text + a label you care about, sLDA can step in to both explain what people are talking about and predict outcomes…

Nov 25, 2025 · 9 min read · 0 claps #latent-dirichlet #supervised-lda #a-beginners-guide

UJ Ujang Riswanto

What is Sparse LDA? A Beginner’s Guide to Efficient Topic Modeling

Learn what Sparse LDA is and why it’s a game changer for large-scale text analysis. This beginner’s guide explains how Sparse LDA works…

Nov 28, 2025 · 8 min read · 0 claps #sparse-lda #latent-dirichlet #a-beginners-guide