Jim Lemon wrote:
stats787 wrote:
Hi,
I am trying to plot the following data such that both variable y and
z vs x.
(ie two lines on a single plot). As the x variable is not numeric,
how do I
go about it? Appreciate if any expert could help. I know I use plot()
follow by lines() to add another line to the plot. But
my problem is i was unable to plot y vs x in the first place.
Hi stats787,
I think this is a replay of a previous problem where the sender
expected the values on the abcissa to be sorted before plotting. You
have the additional camoflage of a factor as that set of values. One
minor problem is that the separator is missing between elements 1 and
2 in the eighth line. After fixing that, try this (assuming your data
frame is named "stats787":
plot(as.numeric(stats787$x)[order(stats787$x)],stats787$y,type="l",col="red")
lines(as.numeric(stats787$x)[order(stats787$x)],stats787$z,col="green")
Oops, that should be:
plot(as.numeric(stats787$x)[order(stats787$x)],stats787$y[order(stats787$x)],
type="l",col="red")
lines(as.numeric(stats787$x)[order(stats787$x)],stats787$z[order(stats787$x)],
col="green")
Jim
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