I believe this was discussed about two days ago -- check the archives under the subject "density plot - beginner's question" -- and there were some good answers. Basically, the x and y vectors have to be increasing and response or Level, as you call it, needs to be in the form of a matrix of dimension length(x) by length(y). If the response/Level is not in the form of a matrix, you will need to smoooth or interpolate.
-roger _______________________________ UCLA Department of Statistics [EMAIL PROTECTED] http://www.stat.ucla.edu/~rpeng On Wed, 15 Jan 2003, mhoward wrote: > r-help, > > I can't seem to get the below data organized in such a manner so as to > generate a contour plot > using any of the functions {lattice.contourplot, base.contour, > base.filled.contour}. I was wondering > if anyone could please tell me what I need to do to accomplish this. > > > X,Y,Level > -31.105,86.911,3843 > -3.385,86.911,3896 > 24.335,86.911,3874 > -24.175,79.700,3900 > -3.385,79.700,3927 > 17.405,79.700,3922 > -51.895,72.489,3874 > 52.056,72.489,3898 > -44.965,65.278,3914 > 45.125,65.278,3951 > -24.175,58.067,3931 > 17.405,58.067,3942 > -79.615,50.856,3831 > 72.845,50.856,3914 > -72.685,43.645,3891 > 65.915,43.645,3972 > -44.965,36.434,3921 > -3.385,36.434,3889 > 38.195,36.434,3965 > -93.475,22.012,3812 > 86.705,22.012,3913 > -86.545,14.801,3876 > -65.755,14.801,3927 > -24.175,14.801,3861 > 17.405,14.801,3872 > 58.985,14.801,3999 > 79.775,14.801,3970 > -93.475,-6.832,3848 > -86.545,-6.832,3894 > -44.965,-6.832,3905 > -3.385,-6.832,3848 > 38.195,-6.832,3949 > 79.775,-6.832,3983 > 86.705,-6.832,3942 > -86.545,-21.254,3880 > 79.775,-21.254,3967 > -93.475,-28.465,3839 > -65.755,-28.465,3945 > -24.175,-28.465,3906 > 17.405,-28.465,3931 > 58.985,-28.465,4011 > 86.705,-28.465,3899 > -72.685,-50.098,3906 > -44.965,-50.098,3971 > -3.385,-50.098,3956 > 38.195,-50.098,4007 > 65.915,-50.098,3970 > -79.615,-57.309,3894 > 72.845,-57.309,3896 > -58.825,-64.520,3925 > 52.055,-64.520,3964 > -65.755,-71.731,3868 > -24.175,-71.731,3972 > 17.405,-71.731,3989 > 58.985,-71.731,3894 > -17.245,-86.153,3926 > -3.385,-86.153,3943 > 10.475,-86.153,3935 > -24.175,-93.364,3855 > -3.385,-93.364,3894 > 17.405,-93.364,3861 > > Thanks, > > Michael R. Howard > Micron Technology, Inc > Fab C Engineering Software (FCES) > Phone368 - 2352 [82352] > Pager 90713 > > ______________________________________________ > [EMAIL PROTECTED] mailing list > http://www.stat.math.ethz.ch/mailman/listinfo/r-help > ______________________________________________ [EMAIL PROTECTED] mailing list http://www.stat.math.ethz.ch/mailman/listinfo/r-help