Problem with axis limits/range when using griddata

Hi,

I'm trying to plot a 3D graph using griddata but don't know
how to specify the scale/range of the axis.

Here's what I'm doing:

1. First I want to define the x and y axes. Note that both
axes should have a range from 0 to 100

[XI,YI] = meshgrid(0:0.1:100,0:0.1:100);

2. x_posns: These are the x-coordinate values and the
values range from 0 to 100, e.g. x = [70.2 0.6 8.9....].
There are a total of 100 x-coordinate values.

3. y_posns: These are the y-coordinate values and the
values range from 0 to 100, e.g. x = [46.2 19.6 39.9....].
There are a total of 100 y-coordinate values.

4. z_values: These are the z values that correspond to
certain x-y coordinates, e.g. coordinate (70.2, 46.2) might
have a z value of 1040.9 and so on.

5. Then I want interpolate the values between the values
I've specified using x_posns, y_posns and z. So I use
griddata as follows:

ZI = griddata(x_posns,y_posns,z,XI,YI,'cubic');

6. Now I want to have a 3D plot of ZI. So I do: mesh(ZI)

PROBLEM:
========
The graph that is plotted has the x-axis starting at 0 and
ending at 1000. But I need it to be from 0 to 100 in
increments of 0.1. The same problem goes for the y axis.
Note that I don't want to *cut off* the part from 100 to
1000. Instead I want the entire range from 0 to 1000 to be
0 to 100 instead.

Any solutions anyone?

Thanks!
Sam
.

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