Blog Archives

Pitfall of XML package: to know the cause

February 5, 2016
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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 →

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

January 31, 2016
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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 →

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First step on GIS with R

January 17, 2016
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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 →

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Calculates population growth rate λ along element changes

November 23, 2014
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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 →

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Sensitivity and Elasticity of seasonal matrix model

October 13, 2014
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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 →

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Stage abundances, eigenvector of population matrix

September 28, 2014
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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 →

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Periodic matrix model for annual plant demography

August 31, 2014
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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 →

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boxplotdbl 1.2.2 and diaplt 1.2.1 packages are now available at CRAN

November 24, 2013
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boxplotdbl 1.2.2 and diaplt 1.2.1 packages are now available at CRAN

The boxplotdbl 1.2.2 and the diaplt 1.2.1 are listed at CRAN.  Now the procedure to install, load and use the package is: install.packages('boxplotdbl') library(boxplotdbl) f <- as.factor(rep(1:2, each=5)) boxplotdou(f, rnorm(10), … Continue reading →

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Double Box Plot package boxplotdbl 1.2.0 released

November 23, 2013
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Double Box Plot package boxplotdbl 1.2.0 released

This article describes changes from the first release on March 2013, including changes from the beta release of package boxplotdbl. New features Newly supported arguments: col COLOR.SHEER factor.labels draw.legend shading … Continue reading →

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Beads Summary Plot of Ranges for R

November 12, 2013
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Beads Summary Plot of Ranges for R

The beadsplot function is designed for a data frame with a factor column and many observation columns.  This function summarize the data visually.  The builtin iris data is suitable to … Continue reading →

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