Generating Geographical matrix using Loop

Question

Oday Shahadh 2017-2-6

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/323535-generating-geographical-matrix-using-loop

评论： KSSV 2017-2-6

I am trying to generate a 2D matrix for the geographical Longitude and Latitude, for the ranges below:

Φ = [0,Δφ,2Δφ, ..., 179Δφ] Θ = [0,Δθ,2Δθ, ..., 287Δθ] . I tried this

long=linspace(0,360,288); lat=linspace(0,180,180); res=zeros(288,180); for i=0:1.25:length(long) for lat=0:1:length(long) res(long,lat)=[long lat]; end end but I got this error

Subscript indices must either be real positive integers or logicals.

Error in odayalbedo (line 12) res(long,lat)=[long lat];

Any suggestions??? Thanks in advance

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Oday Shahadh 2017-2-6

编辑：KSSV 2017-2-6

在 MATLAB Online 中打开

Sorry I made a mistake when copying the code

long=linspace(0,360,288);
lat=linspace(0,180,180);
res=zeros(288,180);
for i=1:1.25:length(long)
    for j=1:1:length(long)
        res(i,j)=[long(i) lat(j)];
    end
end

and I got this error

Subscripted assignment dimension mismatch.

Error in odayalbedo (line 12) res(i,j)=[long(i) lat(j)];

Thanks

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Answer 1

KSSV 2017-2-6

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/323535-generating-geographical-matrix-using-loop#answer_253477

在 MATLAB Online 中打开

Are you looking for this?

M = 288 ; N = 180 ;
long=linspace(0,360,M);
lat=linspace(0,180,N);
[Long,Lat] = meshgrid(long,lat) ;

You cannot save [long(i) lat(j)] into res(i,j). res(i,j) needs a single number and [long(i) lat(j)] are two numbers. Else there should be some other relation between long and lat.