MATLAB: How to create a 3D plot where dimensions refer to spatial coordinates of the points and each point has different size (different diameter).

Hi All

I am wondering how can I create a 3D plot where dimensions refer to spatial coordinates of the points and each point has different size (different diameter)? For example consider plotting some points in a rectangle cube that each point (sphere) has different size. (spatial locations and sizes follow uniform distribution)

Thanks

Best Answer

The scatter3 function can probably do everything you need.

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http://printwiki.org/Point_Size

MATLAB: How to read data from file (different line lengths)

This is how I'd do it:

function data = readfile(filepath)
   data = struct('frame', [], 'camera', [], 'points', []); 
   fid = fopen('yourfile.txt', 'rt');     %open as text. (Takes care of newline conversions)
   cleanupobj = onCleanup(@() fclose(fid));  %close file at end of function or if error
   linecount = 1;
   while ~feof(fid)
      values = str2double(strsplit(fgetl(fid)));  %str2double is a lot safer than str2num
      data(linecount).frame = values(1);
      data(linecount).camera = values(2);
      data(linecount).points = reshape(values(3:end), 2, []).';
      linecount = linecount + 1;
   end
end

Best Answer

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