ЯтомизоnoR

R, Statistics

Pitfall of XML package: to know the cause

This is the sequel to the previous report “issues specific to cp932 locale, Japanese Shift-JIS, on Windows“.  In this report, I will dig the issues deeper to find out what … Continue reading

February 6, 2016 · 2 Comments

Pitfall of XML package: issues specific to cp932 locale, Japanese Shift-JIS, on Windows

CRAN package XML has something wrong at parsing html pages encoded in cp932 (shift-jis).  In this report, I will show these issues and also their solutions which is workable at … Continue reading

January 31, 2016 · 4 Comments

First step on GIS with R

The PM 2.5 checker written by R has been working nicely for me.  I put a shortcut icon of this small script on my desktop PC, to check the air … Continue reading

January 17, 2016 · 3 Comments

Calculates population growth rate λ along element changes

The previous article introduced the sensitivity and elasticity to seasonal matrix model of imaginary annual plant.  Both sensitivity and elasticity are partial derivatives.  This means the values can only predict … Continue reading

November 23, 2014 · Leave a comment

Sensitivity and Elasticity of seasonal matrix model

The previous article introduced the seasonal matrices and the population growth rate λ of imaginary annual plant.  In this article, let’s try the sensitivity analysis of these matrices and the … Continue reading

October 13, 2014 · 1 Comment

Stage abundances, eigenvector of population matrix

The previous article introduced the seasonal matrices and the population growth rate λ of imaginary annual plant.  This article focuses on  the meaning of the eigenvector at first, and then … Continue reading

September 28, 2014 · Leave a comment

Periodic matrix model for annual plant demography

Let’s challenge to build a matrix population model of annual organisms and then calculate the population growth rate λ using R. Consider a simple life cycle of imaginary annual plants; … Continue reading

August 31, 2014 · 3 Comments
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