MATLAB: Why setdiff function ignores to delete the element in the first column of an array

columnfloating pointMATLABproblemsetdiff

>> w =[0.54883746334269044248968027421965, 1.5707963267948966192313216916398,  0.59916277322729276097921590697775;1.5707963267948966192313216916398,  0.7011471887975026432568455778359,   1.5707963267948966192313216916398;-0.54883746334269044248968027421965, -0.7011471887975026432568455778359, -0.59916277322729276097921590697775]
e=setdiff(w,1.5708,'stable')
w =
0.5488 1.5708 0.5992
1.5708 0.7011 1.5708
-0.5488 -0.7011 -0.5992
e =
0.5488
1.5708 (this entry should not be there, but it persists)
-0.5488
0.7011
-0.7011
0.5992
-0.5992
please let me know what change i need to make in setdiff so that the second entry in 'e' gets deleted

Best Answer

You've show its value is 1.5707963267948966192313216916398.
It is the floating point data precision issue.
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