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Description
English: New Zealand's consumption of coal (megatonnes) from 1878 to 2009
Date
Source Own work Data: Source: New Zealand Government Ministry of Economic Development Energy Data File 2009. URL https://spreadsheets.google.com/ccc?key=0AsLhMBA3NXL4dHFMNWxwdllSQWI5TU42RE9kcmNrMWc&hl=en_GB
Author Mrfebruary
SVG development
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Source code
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R code

c <- read.table("edfcoal.txt", skip=2,header=TRUE, sep="\t", na.strings="NA", dec=".", strip.white=TRUE)

str(c)
'data.frame':   132 obs. of  5 variables:
 $ year          : int  1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 ...
 $ Bituminous    : num  NA NA NA NA NA ...
 $ Sub.Bituminous: num  NA NA NA NA NA ...
 $ Lignite       : num  NA NA NA NA NA ...
 $ Total         : num  164821 234928 304736 342674 384342 ...

attach(c)

t<-c(Total/1000000)

b<-c(Bituminous/1000000)

s<-c(Sub.Bituminous/1000000)

l<-c(Lignite/1000000)

summary(t)
  Min. 1st Qu.  Median    Mean 3rd Qu.    Max. 
 0.1648  1.8730  2.3390  2.2840  2.7160  5.7680 

library("RSVGTipsDevice")

devSVGTips(file="nzcoal1878-2009.svg",toolTipMode=0,width=7.8,height=5)

plot(year,t,type="l",col=2,lwd=2,ylim=c(0,6),ylab="Megatonnes",xlab="Year",main="New Zealand's Coal Consumption 1878 - 2009")

mtext(side=3,line=-2.0,cex=1,"Source: Ministry of Economic Development Energy Data File 2009")

lines(year,b,col=4,lwd=2)

lines(year,s,col=3,lwd=2)

lines(year,l,col=5,lwd=2)

legend(1880,5.2,bty = "n",c("Total Coal","Bituminous","Sub Bituminous","Lignite"),lty = 1,lwd=2,col=c(2,3,4,5))

dev.off()

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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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current05:28, 5 February 2011Thumbnail for version as of 05:28, 5 February 2011564 × 361 (14 KB)Mrfebruary{{Information |Description ={{en|1=New Zealand's consumption of coal (megatonnes) from 1878 to 2009}} |Source ={{own}} |Author =Mrfebruary |Date =2011-01-05 |Permission = |other_versions = }} [[Categor

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