Blog Archives

3D Sine Wave

September 16, 2014
By
3D Sine Wave

Had a headache last night, so decided to take things easy and just read posts Google+. Then I came across this post which seems interesting so I thought I would play around before I head to bed. ...

Read more »

Spline interpolation of temporal resolution for satellite images.

August 25, 2014
By
Spline interpolation of temporal resolution for satellite images.

This week, I had a discussion with a few of my colleagues on the possibility of utilizing remote sensing data or satellite images to improve our statistical estimation such as imputation. One source of interest is the

Read more »

Why multiple imputation?

March 20, 2014
By
Why multiple imputation?

Background In the forth coming week, I will be giving a presentation on the fundamentals of imputation to my colleagues. One of the most important idea I would like to present is multiple imputation. In my last post, I have...

Read more »

Accurate imputation and valid statistical inference with ensemble

January 25, 2014
By
Accurate imputation and valid statistical inference with ensemble

Imputation is predictive inference and not causal inference! I have met many people, who consider the two are equivalent. Their reasoning is based on the belief that if you can produce a model which replicate the data generating...

Read more »

First day of State of Food Insecurity (SOFI) 2013

October 2, 2013
By
First day of State of Food Insecurity (SOFI) 2013

The FAO flagship publication SOFI 2013 was release yesterday on the 1st of October, the publication is the most important report in monitoring the progress towards the 2015 Millenium Development Goal and ultimately eliminate hunger. I was interest in how the people responded, so I scrapped some data from Twitter and previous work to carry...

Read more »

Tupper’s self-referential formula

March 24, 2013
By
Tupper’s self-referential formula

Can't remember where I first came across this equation but the Tupper's self referential equation, is a very interesting formula that when graphed in two dimension plane it reproduces the formula. \[ \frac{1}{2} I first thought this would be...

Read more »

Violin plots and regional income distribution

March 20, 2013
By
Violin plots and regional income distribution

While preparing my slides for statistical graphics, a plot really caught my eye when I was playing around with the data. I started off by plotting the time seriesof GNI per capita by country, and as expected it got quite messy and...

Read more »

R package building automation

February 11, 2013
By

Title: R package building automationInspired by the post at http://giventhedata.blogspot.tw/2013/02/my-r-package-development-cheat-sheet.html. I have decided to publish my cheat script for package development as well. Building package used to be a nightmare, filling in all those Rdfiles manually can cause some serious brain...

Read more »

Relearn boxplot and label the outliers

February 5, 2013
By
Relearn boxplot and label the outliers

Despite the fact that box plot is used almost every where and taught at undergraduate statistic classes, I recently had to re-learn the box plot in order to know how to label the outliers.This stackoverflow post was where I found how...

Read more »

A package for agricultural statistic: FAOSTAT

February 3, 2013
By

After 8 years of using R, today I finally become a contributor to the community and released my first package, FAOSTAT.The package is designed to provide user with direct access to the FAOSTAT data base via R and to support the...

Read more »