Articles by Arnold Salvacion

Scatter Plot Matrices in R

November 13, 2014 | Arnold Salvacion

One of our graduate student ask me on how he can check for correlated variables on his dataset. Using R, his problem can be done is three (3) ways. First, he can use the cor function of the stat package to calculate correlation coefficient between vari...
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Creating Inset Map with ggplot2

June 14, 2014 | Arnold Salvacion

According to one of the reason for using inset map is to provide a reference for an area for unfamiliar readers.  Inset map is also considered a great asset for cartographers.  Most of the GIS software available in the market hav...
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