Re: [R] How to add background color of a 2D chart by quadrant

tom soyer [EMAIL PROTECTED] wrote: I have a 2D chart that is divided into four quadrants, I, II, III, IV: plot(1:10,ylim=c(0,10),xlim=c(0,10),type=n) abline(v=5,h=5) text(x=c(7.5,7.5,2.5,2.5),y=c(2.5,7.5,7.5,2.5),labels=c(I,II,III,IV)) I would like to fill each quadrant with a background

[R] How to add background color of a 2D chart by quadrant

Hi, I have a 2D chart that is divided into four quadrants, I, II, III, IV: plot(1:10,ylim=c(0,10),xlim=c(0,10),type=n) abline(v=5,h=5) text(x=c(7.5,7.5,2.5,2.5),y=c(2.5,7.5,7.5,2.5),labels=c(I,II,III,IV)) I would like to fill each quadrant with a background color unique to the quadrant. Does

Re: [R] How to add background color of a 2D chart by quadrant

The basic approach is: 1. call plot (sets up the main plotting) 2. call rect for each quadrant (or polygon if you prefer) 3. add the points with the points function (replotting any points covered by the rectangles) 4. add any additional notation (calling functions such as text, axis, etc.). If