# Introducing my new blog written solely in **R Markdown**

When I realized it was so convenient to write blog directly using R Markdown, I searched if there is a specific tool for it. And I found **Blogdown**, an R package developed by Yihui Xie, who also developed R Markdown.

# Catalog

As a summary, I would like to create a catalog for the main topics I wrote on google blogger before July 2018. I included some figures too, most were created in R.

**1. Details behind my work at Marron Institute**

- The Zipf’s Law in details and the math behind

- How to use our city and population weights

- How I created the city-level GDP per capita

- How I calculated the distances for airport score

**2. Data Visualization**

- The pattern of 3.5 million commuting trips in Chicago

- Visualization using heatmap

- 3D World Map: Air Connectivity (Airport Score)

- Method and New Updates for Airport Score

- Visualization of Conflicts in Colombia and the World

- City population, growth rate, and income

**3. Introduction to Statistics**

- Boxplot can be viewed as a vertical histogram

- RSS Statistic of the year: 69 Americans were killed by lawnmowers annually

- Why a perfect correlation can mean nothing

- Why it is so wrong to average ratios: Simpson’s paradox

- How to calculate the weighted standard deviation

- Logistic regression can be equivalent to contingency table explained by an example

**4. R programming and statistical modeling**