File:Ws-el-price-2009-2012red.svg
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Summary
| Description |
English: New Zealand demand-weighted daily average wholesale price of electricity Data from New Zealand Electricity Authority http://www.reports.ea.govt.nz/OnlineReports.aspx |
| Date | |
| Source | Own work |
| Author | Mrfebruary |
| SVG development | |
| Source code | R codep <- read.csv("demandweighteddailyaverageprice2012.csv", skip = 0,header=TRUE, sep=",", na.strings="na", dec=".", strip.white=TRUE)
#examine data
str(p)
'data.frame': 1152 obs. of 2 variables:
$ Date : Factor w/ 1152 levels "10/01/2010","10/01/2011",..: 501 545 583 621 659 697 735 773 809 844 ...
$ Price: num 46.5 43.5 45.5 46.5 53.8 ...
# 5 number summary of price
summary(p$Price)
Min. 1st Qu. Median Mean 3rd Qu. Max.
0.6819 38.0900 62.0500 71.7400 91.6000 2911.0000
# convert p$Price into time series
pts<-ts(p$Price, frequency = 365, start = c(2009, 201))
# examine time series object
str(pts)
Time-Series [1:1152] from 2010 to 2013: 46.5 43.5 45.5 46.5 53.8 ...
# load SVG device
library("RSVGTipsDevice")
# define name and size of SVG graphic to be created by SVG device
devSVGTips(file="ws-el-price-2009-2012red.svg",toolTipMode=0,width=8,height=6)
# plot commands
plot(pts,ylim=c(0,200),axes="FALSE",type="l",col="darkgrey",cex.main=1.6, main="New Zealand wholesale electricity prices 2009 - 2012",las=1,xlab="Date",ylab="$NZ/MWh")
axis(side=1, las=1,line =0 ,at=c(2009.5,2010.0,2010.5,2011.0,2011.5,2012.0,2012.5), labels=c("June 2009","Jan 2010","June 2010","Jan 2011","June 2011","Jan 2012","June 2012"))
axis(side=2, las=2)
grid()
lines(lowess(pts,f = 14/1152),type="l",col=2,lty=1,lwd=3)
legend("top",bty='n',bg="white", c("price demand weighted daily average","", "price lowess smoothed f = 14 days"), lty = c(1,NA,1),lwd=c(1,NA,2), pch=c(NA,NA,NA),col = c(1,NA,2))
box(lwd=2)
# turn off plotting device (SVG)
dev.off()
|
Licensing
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- 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.
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File history
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 02:03, 6 October 2012 | | 578 × 434 (44 KB) | Mrfebruary | User created page with UploadWizard |
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