error using interp2

I am trying to interpolate a large array of points onto a regular grid. I have a large array called fld1intsty of size 320723x3 double the first, second and third clumns correspond to the x,y and z axes respectively; also, the first column values are distributed between 1.0 and 601.0 whilst the second column values are distributed between 0.0 and 0.8. I have tried to this onto a grid defined spaced with 1.0 and 0.01 in the x and y directions respectiely with the same upper and lower limits.

dx = 1.0;
dy = 0.01;
xi = 1.0:dx:601.0
yi = 0.0:dy:0.8
[XI,YI] = meshgrid(xi,yi);
field1 = interp2(fld1intsty(:,1),fld1intsty(:,2),fld1intsty(:,3),XI,YI);

When I do this I get an error at line 100 (the line starting with field) saying the folloing:

Error using griddedInterpolant
Interpolation requires at least two sample points for each grid dimension.

Error in interp2>makegriddedinterp (line 226)
    F = griddedInterpolant(varargin{:});

Error in interp2 (line 126)
        F = makegriddedinterp({X, Y}, V, method,extrap);

Error in full_band (line 100)
field1 = interp2(fld1intsty(:,1),fld1intsty(:,2),fld1intsty(:,3),XI,YI);

I do not understand what I am doing as the input fields obviously match in size because they are from the same array. Any help would be appreciated, if not in the form of an explanation, then a straight fix would also be great. Also I know that questions like this have been asked already but I found them more confusing than helpful. Thank you

Answer 1

[Chunru]

Looks like you should use "griddata" instead of "interp2" when you have irregular data points (x,y,z). "doc griddata" for details. Otherwise prived some data.

[kristian stokkereit]

Sorry, what does 'prived' mean? Also I changed it to griddata an that appears to have fixed the issue. Thank you very much.

[Chunru]

typo. it should be "provide".