Hello,
Two corrections:
1. To convert from Celsius to Farenheit it's degC*1.8 + 32, not degC*1.4
+ 32
2. The axis tick marks should be in the same _places_, but with
different _labels_.
degC<-seq(-40,120,by=20)
plot(degC,1:9)
axis(3, at=degC, labels=degC*1.8+32) # here
mtext("degF",3,line=2)
To the op:
according to Hadley Wickham, "It's not possible in ggplot2 because plots
with multiple y scales are fundamentally flawed." See
http://stackoverflow.com/questions/3099219/how-to-use-ggplot2-make-plot-with-2-y-axes-one-y-axis-on-the-left-and-another
Hope this helps,
Rui Barradas
Em 12-09-2012 10:11, Jim Lemon escreveu:
On 09/12/2012 09:29 AM, Jonas Stein wrote:
Hi,
how can i plot two different x axis in a ggplot2 qplot?
I want to plot Farenheit and Celsius in one diagram.
x1:Farenheit x2:Celsius
Hi Jason,
Here's a basic example of how to do this sort of thing.
degC<-seq(-40,120,by=20)
plot(degC,1:9)
axis(3,at=degC*1.4+32)
mtext("degF",3,line=2)
Jim
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