two connected graphs
--- Robin Hankin <r.hankin at noc.soton.ac.uk> wrote:
Hi I have two datasets, A and B, consisting of two columns of numbers representing x and y coordinates. They have 10 and 6 rows respectively. I want to plot two scattergraphs, one above the other. The lower graph to contain A (10 points) and the upper graph to contain B (six points). The x-axes of the two graphs must line up. I then want to draw straight lines that connect points of B to a particular point (or points) of A. How do I do this?
?par and read up on mfrow for the two graphs. Here is something that may help for the lines http://finzi.psych.upenn.edu/R/Rhelp02a/archive/1926.html The code below will work but I had to figure out the arrow coordinates by trial and error and there must be a better way. aa <- c(1:10) bb <- c(1:6) op <- par(mfrow = c(2,1), oma=c(1,0,3,0), las=1, xpd = NA ) plot(aa) plot(bb) arrows( 3,3, 4.9, 21.5, length=0)