On 04/08/2014 12:20 PM, David Doyle wrote:
Hello folks,
When I use the lines function below it connects all my points but then
draws a line back to the start point. Any suggestions on what is going on??
mydata<-read.csv("http://doylesdartden.com/R/test_data.csv";, sep=",")
attach(mydata)
plot(EMD~Year,data=mydata, subset = Well.ID %in% c("MW-1", "D_EMD"),
col=ifelse(D_EMD, "black", "red"), pch=ifelse(D_EDM, 19, 17), cex = 1.5)
lines(EMD~Year)
Hi David,
While you will get what you expect with:
lines(EMD[1:39]~Year[1:39])
I would be unnecessarily obscure in suggesting it. Try this:
subset<-Well.ID %in% c("MW-1", "D_EMD")
lines(EMD[subset]~Year[subset])
You haven't selected the same points for the lines function as you have
for the plot function.
Jim
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