Assignment has more non-singleton rhs dimensions than non-singleton subscripts

Question

Sophia 2016-3-28

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/275858-assignment-has-more-non-singleton-rhs-dimensions-than-non-singleton-subscripts

评论： Walter Roberson 2016-4-1

% open binary file for 
% Polar Pathfinder mean monthly 25 km EASE-Grid Sea Ice Motion Vectors, Version 
folderpath = 'C:\Users\sk\Documents\MATLAB\nsidc0116_ice_motion_vector_v3\';
years = 1979:2014;
  sid_allyears = zeros(361,361,12,36);
  yearindex = 0;
  for j = years;
    disp(j);
      yearindex = yearindex+1;
        stryear = num2str(j);
        filepath = fullfile(folderpath,stryear);
        files = dir(fullfile(filepath,'\icemotion.grid.month.*.n.v3.bin') );
        files = {files.name};
        r_years = []; % (361,361,12)
        d_years = []; % (361,361,12)
        mm  = 0 ;
        for i=1:numel(files);
            disp(files{i}); 
            mm = mm+1;
            filename = fullfile(filepath,files{i});
            fid = fopen(filename);
            rawdata = fread(fid,[361, inf],'int16');
            fclose(fid);
            % reshape it into a [3x361x361] matrix
            tdata = reshape(rawdata,[3, 361, 361]);
            % change 3d matrix to simple matrix, and divide by 10 to get cm/second 
            u = squeeze(tdata(1,:,:)./10.);
            v = squeeze(tdata(2,:,:)./10.);
            error = tdata(3,:,:)./10;
            [TH,R] = cart2pol(v,u);
            D = rad2deg(TH);
            r_years(:,:,mm) = R;
            d_years(:,:,mm) = D;  
        end
        sid_allyears(:,:,:,yearindex) = r_years;
    end

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Walter Roberson 2016-3-28

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/275858-assignment-has-more-non-singleton-rhs-dimensions-than-non-singleton-subscripts#answer_215376

在 MATLAB Online 中打开

Your line

r_years(:,:,i) = R;

implies that r_years will be a 3D matrix with the third dimension being as large as the number of files.

Your line

sid_allyears(:,:,j) = r_years;

implies that r_years is a 2D matrix (since j is a scalar.)

This is a fundamental mismatch in expectation about what your r_years matrix is and what your output size should be. Should your third dimension of sid_allyears() be the year index, or should it be the file number index?

4 个评论
显示 2更早的评论隐藏 2更早的评论

Sophia 2016-3-29

编辑：Sophia 2016-3-29

each year contains 12 files..To be honest i don't know how to use this subscript.. i am learning matlab through mathwork discussions, and what so ever i think can work in my case i am using that