On 11/16/2011 03:51 PM, Vinny Moriarty wrote:
Hello All,
Many thanks to the help I have received so far.
Here is an example data set I hope to plot
Data1
Year Data SE
1 2005 2 0.01
2 2006 4 0.01
3 2007 5 0.01
4 2008 2 0.01
5 2009 3 0.01
6 2010 6 0.01
Data2
Year Data SE
1 2006 32 1
2 2007 100 2
3 2008 60 4
4 2009 67 3
5 2010 8 1
Notice Data2 has one less years worth of data than Data1 (which is my
problem)
I am fond of using plotCI as it makes creating error bars and offsetting
overlapping error bars so easy, and double y-axis plots are a breeze
library(plotrix)
library(gplots)
offset=.08
plotCI(x=Data1$Year, y=Data1$Data, uiw=Data1$SE,lty=1,sfrac=.005, type="l",
gap=0, col="red", xlab="YEAR")
par(new=TRUE)
plotCI(x=(Data2$Year) +offset, y=Data2$Data, uiw=Data2$SE,lty=1,sfrac=.005,
type="l", gap=0, col="blue", xaxt="n",yaxt="n",xlab="",ylab="")
axis(4)
This above code is sooo close to what I want. It creates a plot where even
though one data set contains much larger numbers than the other, both fit
on the same plot without me having to manually adjust the Y axis. And the
generating the second Y-axis is simple. But my problem is with the x axis
The issue is that because the two Data sets are not the same size, the
Data2 line gets stretched along the x-axis in the plot to cover the missing
first year. So it looks like Data2 has data in 2005.
I can't plot the Data2 line by the year in Data1 aka (
plotCI((x=(Data1$Year) +offset, y=Data2$Data.......) because the data are
not of equal size
I was thinking something along the line of pulling out the matching years
such as ( plotCI(x=(Data1[c(2:6),1])+offset, y=Data2$Data.......) but I
could not get it to work.
Any suggestions will earn you well earned programing karma and many thanks
from me.
Hi Vinny,
This is one way to do it:
offset<-0.05
plot(Data1$Year-offset,Data1$Data,type="b",ylim=c(0,110))
points(Data2$Year+offset,Data2$Data,type="b")
dispersion(Data1$Year-offset,Data1$Data,Data1$SE)
dispersion(Data2$Year+offset,Data2$Data,Data2$SE)
Not too elegant, but it gets the job done.
Jim
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