I am trying to add some markers onto a contour map image I have created, by using the text() function when I have already produced the map using either image() or filled.contour(). For some reason the points appear to be shifted considerably to the right of where they should be appearing, despite me using exactly the same co-ordinate systems for both. This offset is also dependent on the aspect ratio I use. The map I am looking at is around 3.5x larger in height than width and I need to maximise this in an X window. If I simply use asp=1 the map is pretty unreadable, is there a way I can drastically reduce the margin sizes perhaps? The par() commands I at ve tried haven;t made an appreciable difference - and i'M still very puzzled as to why my data markers are appearing in the wrong place...any suggestions? Thanks, Laura
Hi Laura Quinn wrote:> I am trying to add some markers onto a contour map image I have created, > by using the text() function when I have already produced the map using > either image() or filled.contour(). For some reason the points appear to > be shifted considerably to the right of where they should be appearing, > despite me using exactly the same co-ordinate systems for both. This > offset is also dependent on the aspect ratio I use.See example three in help(filled.contour) - you can use the plot.axes argument.> The map I am looking at is around 3.5x larger in height than width and I > need to maximise this in an X window. If I simply use asp=1 the map is > pretty unreadable, is there a way I can drastically reduce the margin > sizes perhaps? The par() commands I at ve tried haven;t made an appreciable > difference - and i'M still very puzzled as to why my data markers are > appearing in the wrong place...any suggestions?par(mar=whatever) has some effect - although par("mar")[4] does get overridden to make a space between the plot and the legend. Paul -- Dr Paul Murrell Department of Statistics The University of Auckland Private Bag 92019 Auckland New Zealand 64 9 3737599 x85392 paul at stat.auckland.ac.nz http://www.stat.auckland.ac.nz/~paul/