What does this upperline mean?

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Ivor Horton
Ivor Horton 2020-6-17
回答： Steven Lord 2020-6-17
I did a simple test.
What does the lines above bs mean?
  2 个评论
KSSV
KSSV 2020-6-17
syms stand for symbolic. It is a symbolic computation.
Ivor Horton
Ivor Horton 2020-6-17
Yes I know it's symbolic computation. But why only b has upper line and a doesn't? What does the lines mean?

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Steven Lord
Steven Lord 2020-6-17
It indicates that the expression involves the complex conjugate of those elements of b. You didn't tell Symbolic Math Toolbox that b was real, so it has to assume b could be complex. You then use the conjugate transpose operator ' instead of the non-conjugate transpose operator .' so it conjugated b.
syms a
syms b real
withConjugate = [a', b']
withoutConjugate = [a.', b.']

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