MATLAB: How to position a data, in an array of coordinates

MATLABmatrix

How to position a data, in an array of coordinates? I want to create an array of longitude, latitude and temperature? I don't want to interpolate, just position the data.
example:
I have the data in columns
Lon =
   -78   -76   -77   -76
Lat =
   -29   -29   -30   -31
T =
    12     8     9     9
and I want to position in an matrix, like this ยก
Lat =
   -29   -29   -29
   -30   -30   -30
   -31   -31   -31
Lon =
   -78   -77   -76
   -78   -77   -76
   -78   -77   -76
T =
    12   NaN     8
   NaN     9   NaN
   NaN   NaN     9
Regards Claudio

Best Answer

[uLat, uLat_a, uLat_b] = unique(Lat);
[uLong, uLong_a, uLong_b] = unique(Lon);
T = accumarray( [uLat_b(:), uLong_b(:)], T(:), [], @mean, NaN );
[Lat, Lon] = ndgrid(uLat, uLong);
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