self-made using 'R' with this script. polls <- read.table("polls08.csv", header=TRUE, sep=",", na.strings="NA", dec=".", strip.white=TRUE): boxplot(Greens~Poll, data=polls,col = "green",main="Green Party Support by Polling Company - Oct 2005 to Oct 2008", ylab="Sample Percent Support", xlab="Data from 'http://en.wikipedia.org/wiki/Opinion_polling_for_the_New_Zealand_general_election,_2008'", names=c("Nielsen","DigiPoll","Colmar Brunton","Roy Morgan","TNS","UMR"))
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{{Information |Description='Green Party Support analysed by Polling Company, New Zealand political opinion polls from October 2005 to Oct 2008', date obtained from 'http://en.wikipedia.org/wiki/Opinion_polling_for_the_New_Zealand_general_election,_2008'