This is for IE7 to hold div open
1.3.5.2. What is griddata? How do I use it to contour irregularly spaced data?
griddata is a function that interpolates your data to generate evenly spaced data for plotting.
Example: x,y,z => irregularly spaced data
xmin=min(x);
ymin=min(y);
xmax=max(x);
ymax=max(y);
xi=xmin:0.02*(xmax-xmin):xmax;
yi=ymin:0.02*(ymax-ymin):ymax;
zi=griddata(x,y,z,xi',yi);
contour(xi,yi,zi)