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I am trying to classify some data based on euclidean distances in matlab the only problem is that matlab is giving me numbers that look like these as distances
0 + 4.9713i
0 + 7.8858i
num1<num2
num2<num1
both return 0. how is this possible?
The numbers you’re getting are imaginary numbers. You should never obtain imaginary numbers when you calculate Euclidean distances.
Check that your Euclidean distances are correct, such as
distance=sqrt(deltaX.^2 + deltaY.^2)If you’re really sure that your distances should be complex numbers, make the comparison using e.g. the norm, i.e.
norm(num2) > norm(num1)This evaluates to
truefor me.