gravatar

chidungkt

Nguyen Chi Dung

Recently Published

Hanoi Map Only Using ggplot2
Population Pyramids of Vietnam in 1999 (Minnesota Population Center)
Data Pre-processing: Case of VES (Vietnam Enterprise Survey)
Fill in Missing Values with Previous Value: Case of VES (Vietnam Enterprise Survey) Data Set
Quantitative Finance: Compare Investment Strategies Using Backtesting
Use Google Fonts
Data Wrangling and Visualization with R (Course 12, Hanoi - Spring 2021)
Quantitative Finance: Portfolio Backtesting
Bayesian Modelling with Rstan
Quantitative Finance: Bayesian Portfolio Selection
Quantitative Finance: Portfolio Theory (Part 2)
Quantitative Finance: Portfolio Theory (P1)
Tidy Tuesday Project for Data Science
Administrative Map of Vietnam + Spratly and Paracel Islands
Reshaping Data from Wide to Long (and Vice Versa)
Hierarchical Clustering
Infographics Using R
Shapes of Histograms
Compare Maximum Profit between Random Forest and Logistic (tidymodels)
Understand ROC Curve and Search Threshold that maximizes Profit
Data pre-processing for Kalapa Credit Scoring Challenge
Should we impute missing data? (Python)
Effect of Hyperparameter Optimization on Profit (Python)
Effect of AUC on maximum profit (Python)
Profit Criterion for selecting Machine Learning Classifier (Python)
Bayesian Optimization for searching optimal Recall for XGBoost Classifier (Python)
Benford law as a feature engineering technique for Machine Learning Models
Why You Should Not Use Pie Chart
Misleading Charts by The Economist and Correction
U.S. Unemployment
2019 Kaggle ML & DS Survey (Part 1)
Crawl Data from Vietnam Job Websites
Recommendation System (Part 4)
Bar Chart Race Animation
Streetmap of Ho Chi Minh City
Ages through Time and Space
Recommendation System (Part 3)
Recommendation System (Part 2)
Visualize Likert Scales
Recommendation System (Part 1)
Math Score Distribution by Ha Giang
Download Your Favorite Textbook and Scientific Reseach Paper
Data Imputation: A case from Kaggle Competition (Part 1)
Dual y-axis with ggplot2: Safe Skies
SIR model for understanding Coronavirus pandemic
Coronavirus cases in Vietnam (Line + Bar Version)
Coronavirus cases in Vietnam
Auto ARIMA for forecasting Deaths by Coronavirus in Italy
Deaths by Coronavirus between China and Italy
Corona Virus Prevalence by Country
Automated Machine Learning for Credit Scoring Problem
Predicting Employee Churn: A Short Comparision between Xgboost and Keras Deep Learning
Classification Cutoff Maximizes Profit using Bayesian Optimization
Bayesian Optimization for Turning XGBoost Hyperparameter
Kalapa’s Credit Scoring Challenge - A Naive Approach with Ranking of 19
Pity Russia’s billionaires (complete version)
Pity Russia’s billionaires
Average annual hours worked by persons engaged, 2017
Share of Vietnam government spending on health care, 2014
Vietnam ’s fertility rate
Origin of crude oil imported to China
Matters of the heart
Global terrorism, 2000 - 2014 (Version 2)
Global terrorism, 2000 - 2014 (Version 1)
Greying of the Nobel laureates
Gender Pay Gap by Britain Banks
Gap in Life expectancy between Male and Female
Life expectancy gender gap, 2018
AUC or IV Criterion - Which Method is Better for Feature Engineering?
Predict Customer Purchase (Deployment/Application)
Predict Customer Purchase (GBM and Adjust Cutoff for Classification)
Predict Customer Purchase
Market Segmentation: K-means Clustering Algorithm
Hanoi Housing Market: Predict House Price
Average Penis and Breast Size by Country
30 Shortest Countries, 2019
Create Bar Chart with Descending Order of Proportion by Using geom_col()
Spam Detection Using Random Forest Algorithm
Share of Government Spending on Health Care: Vietnam and United States
Portfolio Theory: Estimate Beta for All Companies Listed on Ho Chi Minh Stock Exchange (HOSE)
wbstats - R Package for Collecting Data From World Bank
Quantile Regression Using R
Replicate a The Economist Style Graph (Area Chart)
Mapping Vietnam Provincial Competitiveness Index 2018
Population Structure of Vietnam: 1995 - 2018
Scraping Data from VNDIRECT Securities Corporation
Reodering for Grouped Barplot
Kaggle Data Science Survey (Median Salary by Major)
Mini Course: Collect Data for 78704 Homes for Sale in Hanoi
US Military Fatal Casualties During the Vietnam War
Using Accuracy Criterion for Credit Classification Can Cause Disaster for Banks
R for Psychologists and Marketing Research: Structural Equation Modeling (SEM)
Visualization of Classifier Performance
Population Pyramid Graph for Vietnam in 2018
Kaggle Data Science Survey (Hardware Using for Data Science Projects)
Kaggle Data Science Survey (Compensation and Degree)
Kaggle Data Science Survey (Data Wrangling May Be The Most Time-Consuming)
Kaggle Data Science Survey (Most Used ML Models)
Kaggle Data Science Survey
Effect of AUC on Sensitivity and Specificity by Machine Learning Model
Top Seven Trade Partners of Vietnam by Export Volume
IFRS 9 and CECL Credit Risk Modelling (Chapter 3, Part 1)
China is Redrawing the Map of World Science
Worst Airlines by Flight Delays/Cancellations in Vietnam
World Nuclear Power Report 2018
A Detailed Comparison Between Machine Learning and Logistic Approach to Scorecard Modelling/Credit Scoring
The Problem of Monotonic Binning when Developing Scorecard Model
IFRS 9 and CECL Credit Risk Modelling and Validation (Chapter 2)
Does Balancing Classes Improve Classifier Performance?
Never Argue with Stupid People
Age Distribution of American Boys Named Joseph
Why Milions of Vietnamese Men Must Be Staying Single in The Future?
Deep Learning for Credit Scoring in the Era of Big Data (Adapted from a research conducted by MIS, Banking Academy of Vietnam)
China–United States Trade War: Facts and Figures
Consequences of WOE Binning for Logistic Regression
Perform Logistic Regression with R
Cumulative Accuracy Profile (CAP) and Accuracy Ratio (AR) Estimation
Does WOE Transformation Improve Logistic Regression’s Performance?
A Naive Approach to Ranking Vietnam Universities
When You Need Explanation: Decision Tree Algorithms (CART and CHAID)
Lasso and Ridge Logistic (h2o Package)
My Secret Codes: Logistic vs Support Vector Machine (kernlab Package)
Ensemble Learning Methods: What Are They and Why Use Them?
Use Autoencoder as a Feature Engineering Technique
Training and Turning Parameters for Random Forest Using h2o Package
Detecting Financial Fraud Using Machine Learning: War Against Imbalanced Data
Measuring Model Performance in Classification Models: A Short Explanation About Confusion Matrix and Its Application
Cancer Prevalence Across All Types by Country in 2016
Problem of Low Default Portfolios (LDPs) in Credit Scoring and Modelling Scorecard
An Application of Credit Scoring: Developing Scorecard Model for A Vietnam Commercial Bank
Feature Selection for Logistic Classifier based on AIC Criterion
Missing-data Imputation and Use map() Function for Comparing among Alternatives (diabetes.csv)
Best Global Universities: An Application of Using try() Funtion
Predictions for Daily Cash Withdrawals at ATMs
Happy Vietnam Women’s Day
Forecasting Time Series: Auto ARIMA, Ensemble Method and Artificial Neural Networks
Forecasting Daily Cash Demand: Long Short Term Memory vs ARIMA Aprroach
Environment and Development
Forecasting Daily Cash Demand: A Short Comparision between Automatic Machine Learning and ARIMA Aprroach (Case 1)
One-step Ahead Prediction for Cash Withdrawals: Comparing Three Approaches to Forecasting
Cointegrated Time Series and Augmented Dickey Fuller Test
Holt-Winters’ Seasonal Methods for Forecasting Time Series
Using R Markdown for Reporting: Template 2
Using R Markdown for Reporting: Template 1
Colour Gradient and Theme (ggplot2)
geom_ribbon()
Data Visualization (GSO, Part 4)
Data Visualization (GSO, Part 3)
Data Visualization (GSO, Part 2)
Data Visualization (GSO, Part 1)
GDP Sector Composition
Nice Bar Graph from Data Visualisation with R: 100 Examples
Use Favorite Fonts in R
Using Colours (viridis package)
Feture Selection / Engineering for Machine Learning Models
A Function for Calculating Distance based on Haversine Formula
Daily Income of Sex Workers in Hanoi and Saigon
Location of Real Estate Projects in Hanoi
NGO Jobs (30_03)
Florence Nightingale’s Data On Deaths From Various Causes In The Crimean War
A Big Project for Data Science in Banking Course (Part 2)
Approach in Machine Learning and caret Package
Steps for Implementing a Machine Learning Project
A Big Project for Data Science in Banking Course (Part 1)
R Course: Data Analytics in Banking for Bankers
Parallel Computing for Machine Learning Algorithms
Professors 2017
Data Analysis Course at USTH (Section: Statistics, Part 3)
Using R for Biostatistics (USTH Course, Part 2)
VHLSS 2016 Project: Life Quality
VHLSS 2016 Project (Data Provided by NA Brother)
Loại bỏ Outliers theo Cook’s Distance hoặc nằm ngoài 2 lần độ lệch chuẩn so với mean của phần dư
Regression Line with Error Distances
Composition of world's Export in 2016
Predict and Analyze Customer Churn using Survival Analysis (R Project, Week 1)
Principal Component Analysis (Principal Component Methods in R)
Chapter 4: K-Means Clustering (Cluster Analysis in R)
Information Value and Weight of Evidence (WoE)
A Function for calculating Distance to Default based on contingent claim framework proposed by Merton (1974)
(Econometric Course at VCREME) Chapter 2: The Simple Regression Model
Machine Learning: Parallel computing in R
Adjust theme for ggplot2 (Part 1)
Style your Bar charts like the Business Insider
The Code Book: The Science of Secrecy from Ancient Egypt to Quantum Cryptography
Citation Analysis 2
Machine Learning: Ridge Regression from An Introduction to Statistical Learning, Chapter 6
Text Mining: The number of English words used for Basic Econometrics by Gujarati
Marketing Research with SPSS (Chapter 5, Part 1)
Machine Learning (Section 1): Linear Regression and Its Cousins - Ridge Regression
The most Popular Econometricians
John Tukey and Boxplot
NPV and IRR
Số từ sử dụng để viết Principles of Economics