Create a 2-D contour using kmlwrite to create kml file

Hi I want to export this plot to a kml file.

 figure
   scatter (long(start:stop), latg(start:stop), 40, ch4i(start:stop), 'filled')
   hold on 
   colorbar
   quiver(long(start:1500:stop), latg(start:1500:stop), Ui(start:1500:stop), Vi(start:1500:stop), 'k' , 'LineWidth', 4,'AutoScaleFactor',1.2, 'MaxHeadSize', 0.3)
grid on
title 'Bellridge south color plot' 
xlabel ' Latitude'
ylabel ' Longitude'

all of the variables are defined, how do I use the kmlwrite function to create a kml file?

Thanks