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 →

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 →