Image:NZ opinion polls 2005-2008.png

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[edit] Summary

Description

Graph showing support for political parties in New Zealand since the 2005 election, according to various political polls. See w:Opinion_polling_for_the_New_Zealand_general_election,_2008 for details of the polling data.
Source

self-made
Date

24 March 2008, updated 4 May 2008.
Author

Avenue (Avenue)
Permission
(Reusing this image)

see below

This graph was created using R's ggplot2 package. Here is the source code, available under GPL version 2 and later as well as the licenses below.

library(reshape)
library(ggplot2)
polls <- read.csv("NZ opinion polls 2006-2008.csv")
polls$Date <- as.Date(polls$Date)
lpolls <- melt(polls[,-3], id.var=c("Poll", "Date"), variable_name="Party")
names(lpolls)[4] <- "Support"
levels(lpolls$Party)[3:4] <- c("NZ First", "Maori Party")
levels(lpolls$Party)[7] <- "United Future"
lpolls$Party <- with(lpolls, reorder(Party, Support, na.rm=TRUE))
p <- ggplot(lpolls[(lpolls$Date >= as.Date("2005-09-17")) & 
    (lpolls$Party %in% c("Labour", "National", "NZ First", "Greens")),], 
    aes(x=Date, y=Support, colour=factor(Party)))
p + geom_point() + stat_smooth() + 
    scale_colour_manual(name = "Party", values = c("black", "forestgreen", "red", "blue")) + 
    scale_x_date(major="4 months", format="%b-%Y") +
    scale_y_continuous(breaks=seq(from=0, to=55, by=5), name="Party support (%)")

[edit] Licensing

I, the copyright holder of this work, hereby publish it under the following licenses:
GNU head Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation license, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation license".

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File history

Click on a date/time to view the file as it appeared at that time.

Date/TimeDimensionsUserComment
current10:21, 4 May 20081,600×1,198 (176 KB)Avenue
04:08, 23 April 20081,600×1,198 (169 KB)Avenue
11:10, 24 March 20081,600×1,198 (167 KB)Avenue (== Summary == {{Information |Description=Graph showing support for political parties in New Zealand since the 2005 election, according to various political polls. See w:Opinion_polling_for_the_New_Zealand_general_election,_2008 for details of the po)
02:07, 24 March 20081,528×1,166 (207 KB)Avenue ({{Information |Description=Graph showing support for political parties in New Zealand since the 2005 election, according to various political polls. See w:Opinion_polling_for_the_New_Zealand_general_election,_2008 for details of the polling data. |S)
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