Add geom_errorbar() before adding geom_point() ?
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Nathan Miller <natemiller77@gmail.com> wrote:

Hi all,

This seems like a basic problem, but no amount of playing with the code has
solved it. I have a time-series data set like that shown below (only longer)
and am seeking to plot the data with filled, circular points and error bars.
I would like the error bars to be behind the points otherwise they tend to
obscure the points (especially when I have a lot of points in the actual
data set). Despite providing a fill colour for the points and using shapes
that utilize fill colours, the error bars are always placed on top of the
points. Can anyone see the error I am making? I simply want to move the
error bars so they are behind the data points.

Thanks for your help. I assume its simple...or else its a bug.

Nate


Time SAP Temp SAPSE
0.00 1.000000 25 0.000000
0.25 1.040000 25 0.041200
0.50 1.040000 25 0.093500
0.75 1.060000 25 0.081800
1.00 1.040000 25 0.131000
1.25 1.220000 25 0.144000
1.50 1.010000 25 0.071200
0.00 1.000000 15 0.000000
0.25 1.010000 15 0.015600
0.50 1.010000 15 0.033700
0.75 1.060000 15 0.048100
1.00 1.010000 15 0.016800
1.25 0.977000 15 0.004860
1.50 0.959000 15 0.015500
0.00 1.000000 8 0.000000
0.25 1.010000 8 0.004620
0.50 1.060000 8 0.049100
0.75 0.921000 8 0.032900
1.00 0.951000 8 0.030400
1.25 0.904000 8 0.047100
1.50 0.911000 8 0.072200

limits<-aes(ymax=NerveSurv$SAP+NerveSurv$SAPSE,ymin=NerveSurv$SAP-NerveSurv$SAPSE)

p<-ggplot(data=NerveSurv,aes(x=Time,y=SAP))

p+geom_point(aes(colour=factor(Temp), shape=factor(Temp),
fill=factor(Temp)), size=4)
+geom_errorbar(limits,width=0.2)
+xlab("Time (min)")
+xlim(c(0,50))
+ylab("Normalized Spontaneous Action Potential Rate")
+ylim(c(0,1.6))
+scale_shape_manual("Acclimation Temperature",breaks=c(8,18,25),
labels=c("25 �C", "18 �C", "8 �C"),values=c(21,21,21))
+scale_fill_manual("Acclimation Temperature",breaks=c(8,18,25), labels=c("25
�C", "18 �C", "8 �C"),values=c(colours()[c(173,253,218)]))
+scale_colour_manual("Acclimation Temperature",breaks=c(8,18,25),
labels=c("25 �C", "18 �C", "8 �C"), values=c(colours()[c(173,173,173)]))

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