Message-ID: <516DD4C7.607@bitwrit.com.au>
Date: 2013-04-16T22:46:31Z
From: Jim Lemon
Subject: plot 2 y axis
In-Reply-To: <CAAvu=bmEPypec1DCMDeRTgSPijfBRk_BQDGkjzkKPbfRKg-Z2A@mail.gmail.com>
On 04/17/2013 08:35 AM, Ye Lin wrote:
> Hi,
>
> I want to plot two variables on the same graph but with two y axis just
> like what you can do in Excel. I searched online that seems like you can
> not achieve that in ggplot. So is there anyway I can do it in a nice way in
> basic plot?
>
> Suppose my data looks like this:
>
> Weight Height Date
> 0.1 0.3 1
> 0.2 0.4 2
> 0.3 0.8 3
> 0.6 1 4
>
> I want to have"Date"as X axis ,"Weight" as the left y axis and "Height" as
> the right y axis.
>
Hi Ye lin,
Try this (yldat is your data above as a data frame):
library(plotrix)
twoord.plot(yldat$Date,yldat$Height,yldat$Weight,
lylim=c(0,1.04),rylim=c(0,0.61),
xtickpos=1:4,xticklab=1:4)
That should get you started.
Jim