How to plot a surface in Matlab?

I would like to plot a surface in matlab; however, matlab is assigning each element of the matrix to an intersection of the meshgrid. I want each element of my matrix to be the value of each square in the meshgrid, not at the intersections. The result of this problem is that I am 'missing' a row/column on one end of my surface plot due to the color mapping. Using the data cursor I can confirm that the values are there, except on the intersections of the grid lines; hence the edges are effectively missing a row/column visually. I want a 3D equivalent of imagesc. Any ideas?

[Massimo Zanetti]

A square has 4 vertex.. So you cannot assign one value to a square.

[Cankut Eker]

So there is no way to center the values onto the squares? Is there a way to shift the meshgrid so that it seems like the intersections are in the middle of the squares?

[KSSV]

How about assigning all four values same to each vertex?

[Cankut Eker]

That's a good idea, but I think there may be a discontinuity in some row or column at the end since there will inevitably be 2 corners=x and the other 2 corners=y.

[KSSV]

Have you tried shading interp after plotting the surface?

[Cankut Eker]

Thank you so much! It worked! Is there anyway to put the surface lines on?

[Cankut Eker]

Nevermind figured it out. Thank you very much everyone!

Answer 1

[José-Luis]

You could use image() instead.

[Cankut Eker]

Image does work to fix this problem, but it still only generates a 2D plot, unless i'm missing something. Thanks for the suggestion though!

[José-Luis]

In that case I think you need to interpolate first and then use surf() and variants.

[Cankut Eker]

I think this would have also solved it so I am going accept this as an answer, including the line 'shading interp' solved it. I just need to find a way to put the lines back into the surface plot :)

[Cankut Eker]

The property 'edgecolor','k' did the trick ;)