Problem with Unique on table
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When a table t is:
t =
11×4 table
Apex Left Right Type
_________ _______________ _______________ ____
0+3.0777i -1+0i 1+0i A
0+3.0777i -2.618+1.1756i -1+0i Ap
0+3.0777i -3.2361+3.0777i -2.618+1.1756i A
0+3.0777i -2.618+4.9798i -3.2361+3.0777i Ap
0+3.0777i -1+6.1554i -2.618+4.9798i A
0+3.0777i 1+6.1554i -1+6.1554i Ap
0+3.0777i 2.618+4.9798i 1+6.1554i A
0+3.0777i 3.2361+3.0777i 2.618+4.9798i Ap
0+3.0777i 2.618+1.1756i 3.2361+3.0777i A
0+3.0777i 1+0i 2.618+1.1756i Ap
0+3.0777i -1+0i 1+0i A
Why 'unique' used as:
>> tu=unique(t,'rows')
tu =
11×4 table
Apex Left Right Type
_________ _______________ _______________ ____
0+3.0777i -1+0i 1+0i A
0+3.0777i 1+0i 2.618+1.1756i Ap
0+3.0777i -1+0i 1+0i A
0+3.0777i -2.618+1.1756i -1+0i Ap
0+3.0777i 2.618+1.1756i 3.2361+3.0777i A
0+3.0777i 3.2361+3.0777i 2.618+4.9798i Ap
0+3.0777i -3.2361+3.0777i -2.618+1.1756i A
0+3.0777i 2.618+4.9798i 1+6.1554i A
0+3.0777i -2.618+4.9798i -3.2361+3.0777i Ap
0+3.0777i 1+6.1554i -1+6.1554i Ap
0+3.0777i -1+6.1554i -2.618+4.9798i A
produces 11 rows with tu(1,:) identical to tu(3,:) ?
回答（1 个）
Walter Roberson
2021-3-7
Use format long g and then look at the entries again. And check out
tu.Apex(1)-tu.Apex(3)
and you will probably see a small difference.
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