How to position a data, in an array of coordinates?

Question

Javier 2012-10-14

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/50806-how-to-position-a-data-in-an-array-of-coordinates

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 ¡

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

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Walter Roberson 2012-10-15

在 MATLAB Online 中打开

An array such as

[Latitude, Longitude, Temperature]

with the values down the columns ?

Javier 2012-10-15

在 MATLAB Online 中打开

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 ¡

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

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Answer 1

Walter Roberson 2012-10-15

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/50806-how-to-position-a-data-in-an-array-of-coordinates#answer_61968

在 MATLAB Online 中打开

[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);