[R] plot centered line on barplot
ligges at statistik.uni-dortmund.de
Fri Jul 20 13:09:45 CEST 2007
claudio.is at libero.it wrote:
> Dear R user,
> I need plot an histogram for the occurrence of a dataset, and then add a line corresponding to the freuqnecy of another similar dataset. in order to do this i used the function
>> hist_data1=hist(data1, breaks= seq(0,50,5), plot=FALSE)
>> hist_data2=hist(data2, breaks= seq(0,50,5), plot=FALSE)
> then I plotted the frequency
barplot() returns the positions on x-axis (these may be non-integers)
where it draws the plots, hence you can say:
bp <- barplot(hist_data1$density)
> but the line is shifted in respect to the center of the bars. how can I properly plot the line? another question. this is easy, how can I smooth the curve (not fit with loess of spline)?
If you do not tell us which kind of smoother you prefer ....
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