File:Nationwide opinion polling for the United States presidential election, 2012.svg
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Size of this PNG preview of this SVG file: 800 × 356 pixels. Other resolutions: 320 × 142 pixels | 640 × 284 pixels | 1,024 × 455 pixels | 1,280 × 569 pixels | 2,560 × 1,138 pixels | 810 × 360 pixels.
Original file (SVG file, nominally 810 × 360 pixels, file size: 217 KB)
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Summary[edit]
| Description |
English: A combination of nationwide opinion polls during the 2012 U.S. presidential election. The trend lines are Local Regressions with α = 0.8 and 95% confidence interval ribbons. The point sizes and trend lines are weighted according to the margin of error of each poll. |
| Date | |
| Source | Own work |
| Author | Abjiklam |
Licensing[edit]
I, the copyright holder of this work, hereby publish it under the following license:
This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International license.
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
Code[edit]
The graph is generated by the following R script, largely inspired by this file.
library(RCurl)
library(reshape)
library(htmltab)
library(ggplot2)
library(stringr)
library(scales)
#get the table from the url
theurl <- getURL("https://en.wikipedia.org/wiki/Nationwide_opinion_polling_for_the_United_States_presidential_election,_2012", ssl.verifyPeer=FALSE)
table <- htmltab(theurl, which=2)
df = table[2:nrow(table), c(2,3,4,6)]
names(df) = c("Date", "Obama", "Romney", "Size")
df$Date = sub("[0-9]+–([0-9]+)", "\\1", df$Date)
df$Date = sub(".*–", "", df$Date)
df$Date = sub(".*-", "", df$Date)
df$Date = trimws(df$Date)
df$Date = as.Date(df$Date, format="%B %d, %Y")
for (i in c(2:3)) {
df[[i]] = as.numeric(sub("%", "", df[[i]]))/100
}
df$Size = sub(",", "", df$Size)
df$Size = sub("≤", "", df$Size)
df$Size = sub("([0-9]+).*$", "\\1", df$Size)
df$Size = as.numeric(trimws(df$Size))
df$Error = 1/sqrt(df$Size)
mdata <- melt(df, id=c("Date", "Error", "Size"))
names(mdata)[4:5] = c("Candidate", "Support")
colors = c("#3333FF", "#FF3333")
labels = c("Obama", "Romney")
results = mdata
election = data.frame(Date = rep(as.Date("2012/11/6"), 2),
Support = c(0.511, 0.472),
Candidate = labels,
Error = c(1,1))
d = ggplot(results, aes(x=Date, y=Support, colour=Candidate, size=1/Error, weight=1/Error)) +
geom_point(alpha=0.7) +
geom_smooth(span=0.8, show.legend=F) +
scale_colour_manual(values = colors) +
labs(title="Nationwide opinion polling for the 2012 U.S. presidential election") +
scale_size_area(max_size=4,
labels=function(x) x^2,
name="Sample Size") +
scale_y_continuous(breaks=seq(0,1,0.05), minor_breaks=seq(0,1,0.01), labels=percent,
limits=c(0.35, 0.55)) +
scale_x_date(labels=date_format("%b %d"),
breaks=c(seq(as.Date("2012/9/11"), as.Date("2012/11/6"), "week")),
minor_breaks=seq(as.Date("2012/9/10"), as.Date("2012/11/6"), "day"),
limits=c(as.Date("2012/9/10"), as.Date("2012/11/6"))) +
theme(panel.grid.minor=element_line(size=0.2),
panel.grid.major=element_line(size=0.8)) +
geom_point(data=election, size=3, shape=5, show.legend=F) +
geom_point(data=election, size=2, show.legend=F) +
geom_text(data=election, show.legend=F,
aes(label=c("51.1", "47.2")),
size=3, hjust=-0.2, vjust=-0.4, color="#000000")
#save plot as "us2012.svg"
svg(filename="us2012.svg",
width=9,
height=4,
pointsize=12,
bg="transparent")
d
dev.off()
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 04:42, 30 May 2016 | | 810 × 360 (217 KB) | Χ (talk | contribs) | tweak |
| 15:57, 24 May 2016 |  | 810 × 360 (218 KB) | Χ (talk | contribs) | y range | |
| 16:03, 7 April 2016 |  | 749 × 375 (216 KB) | Χ (talk | contribs) | User created page with UploadWizard |
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