Hi Tony:
I suspect your data may looks like:
If so, since the data is not uniform spaced, you can not use direct matrix conversion method. However, you can try this script to transform to XYZ data frist:
%S=%H;
nr = wks.maxrows;
nc = wks.ncols;
window -t data origin;
%O=%H;
wks.addcol();
wks.col=3;
wks.col.type=6;
nn=1;
for(ii=2; ii<=nc; ii++)
{
for(jj=2; jj<=nr; jj++)
{
%(%O, 1, nn) = %(%S, jj, 1);
%(%O, 2, nn) = %(%S, 1, ii);
%(%O, 3, nn) = %(%S, jj, ii);
nn++;
};
};
Then you will get a new worksheet data, the X, Y, Z values are placed in one column, like:
After that, highlight the Z column of the new worksheet, and select Edit : Convert to matrix : Random XYZ to convert the data to matrix. Then you can plot a contour.
Larry
OriginLab Technical Services
contour plot with non equidistant steps
Posted - 05/09/2007 : 08:10:23 AM
