Hi all.

I'm working on an assignment for a psychology class and I am not sure how to
adjust the y-axis so it displays the range: 0, 5, 10, 15

The code below is almost ideal:

lsd = c(3, 5, 13)
mar = c(1, 2, 3)
g_range <- range(0, lsd, mar)
plot(lsd, type="o", col="blue", ylim=g_range,
axes=FALSE, ann=FALSE)
axis(1, at=1:3, lab=c("Low","Med","High"))
axis(2, las=1, at=5*0:max(mar))
box()
lines(mar, type="o", pch=22, lty=2, col="red")
title(main="The Effect of Drug Dosage and Type on the Number of
Hallucinations", col.main="red", font.main=4)
title(xlab="Dose", col.lab=rgb(0,0.5,0))
title(ylab="Number of Hallucinations", col.lab=rgb(0,0.5,0))

Thanks,

~Caitlin

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