[R] Subset for plot in R

arun smartpink111 at yahoo.com
Mon Feb 17 17:18:19 CET 2014

 dat1 <- data.frame(year= rep(2010:2013,c(10,8,9,13)),x=sample(1e4,40,replace=TRUE),y=sample(40,40,replace=TRUE))
plot(x~y,data=dat1,subset=year > 2012)
with(subset(dat1,year > 2012),plot(y,x))


Hi R people 

This might take me the whole day to figure out, instead I will ask so I can save some PhD time. 

I want to plot a subset of my data. 

x = area 
y = concentration 

these data are sorted by 

z = year (2008 to 2013) 

So I want to make a plot where I can see x and y >=2012 and <2012. 

I have tied 
plot(data$y[year>='2012'], x[year>='2012']) That did not work. 

also plot(data$y, data$x, year>'2012') did not give the right data plot 

Any suggestions on how to do this would be appreciated. 

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