Author: tomizono

I privately had some questions and reply here, because it may also help others including me. 1. How to specify size With plot axis parameters. > ellipseplot(iris[,c(‘Species’, ‘Sepal.Length’)], iris[,c(‘Species’, ‘Sepal.Width’)],...continue reading.

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.

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.

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.

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.

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.

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.

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.