Which function should I use to plot 2-D color figures out of a XYZ grid data results?

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Leon 2014-1-13

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Below is my code:

[X, Y] = meshgrid(110:0.5:300, -80:0.5:60);
z_grid = griddata (double(lon), double(lat), double(z), X, Y);

So after I finish griding my data, which command I should use to plot a 2-D figure of the z_grid (X, Y are longitude and latitude, respectively) using color scales. I was trying to use "scatter", but after I extract a 3-column data out of the grid and then use "scatter", it drains too much resources for my computer to handle.

Thank you.