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How to calculate euclidean distance for 3 vectors using matlab

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krishnasri
krishnasri 2015-3-16
评论： krishnasri 2015-4-19
Say suppose I have 83*3 matrix in an excel sheet and similarly I have 600 sheets with 83*3 matrix/data those vectors are x,y,z and I need to calculate distance between first and second data set/excel sheet date, second and third,third and fourth ...till 600
some one help to solve using MATLAB code
  2 个评论
Andrew Newell
Andrew Newell 2015-3-16
Judging by your title, you actually want to find the distance between column 1 of your first sheet and column 1 of the other sheets; and ditto for columns 2 and 3. Correct?
krishnasri
krishnasri 2015-3-25
编辑：Andrew Newell 2015-3-25
yes exactly that is what i meant, can you please help me with the code??

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Andrew Newell
Andrew Newell 2015-3-25
编辑：Andrew Newell 2015-4-15
You can find the Euclidean distance between two vectors v1 and v2 using norm:
distance = norm(v1-v2);
I don't know how you are importing the sheets, so let's just look at two sheets, with your initial matrix being sheet0 and the other sheets being numbered 1, 2, ...
(Edited to correct error)
sheetdiff = sheet1-sheet0;
npoints = size(sheet0,1);
distance = zeros(npoints,1);
for I = 1:npoints
distance(I) = norm(sheetdiff(I,:));
end
Now you'll have to put this inside another loop where you look at one sheet at a time.
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Andrew Newell
Andrew Newell 2015-4-18
Judging by the last line, you are treating sheetdiff as the answer. It isn't. The real answer is distance, which has dimensions npoints x 1.
krishnasri
krishnasri 2015-4-19
Okay thanq got it. But what for are we using distance(I) = norm(sheetdiff(I,:))?

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