표현식，함수，행렬행렬기호찾기찾기GydF4y2Ba

표현식，함수함수행렬기호를찾으려면찾으려면GydF4y2BaSymvarGydF4y2Ba을사용하십시오。예를，기호표현식GydF4y2BaFGydF4y2Ba와GydF4y2BaGGydF4y2Ba에서모든변수찾아보겠습니다찾아보겠습니다。GydF4y2Ba

syms a b n t x f = x^n;g = sin（a*t + b）;Symvar（F）GydF4y2Ba

ans = [n，x]GydF4y2Ba

여기서GydF4y2BaSymvarGydF4y2Ba은반환변수를으로합니다합니다합니다。마찬가지，다음다음입력하여GydF4y2BaGGydF4y2Ba에서기호를수있습니다。GydF4y2Ba

Symvar（G）GydF4y2Ba

ans = [a，b，t]GydF4y2Ba

SymvarGydF4y2Ba은기호，기호행렬또는함수에서처음처음GydF4y2BanGydF4y2Ba개의변수반환수도있습니다있습니다。GydF4y2BaSymvarGydF4y2Ba이반환기호변수개수를지정하려면GydF4y2BaSymvarGydF4y2Ba의두파라미터사용하십시오。예를，기호표현식GydF4y2BaGGydF4y2Ba에서찾은처음개의를반환해보겠습니다보겠습니다。GydF4y2Ba

Symvar（G，2）GydF4y2Ba

ans = [b，t]GydF4y2Ba

이경우처음처음개의변수가가GydF4y2Ba一个GydF4y2Ba와GydF4y2BabGydF4y2Ba가아닌을수있습니다。2개의를하여하여GydF4y2BaSymvarGydF4y2Ba을호출사전순으로정렬에에GydF4y2BaXGydF4y2Ba에가까운에기호를찾습니다찾습니다。GydF4y2Ba

기호함수에대해GydF4y2BaSymvarGydF4y2Ba을호출하는경우GydF4y2BaSymvarGydF4y2Ba은다른함수값이먼저하면서를반환합니다합니다。GydF4y2Ba

syms x y w z f（w，z）= x*w + y*z;Symvar（F）GydF4y2Ba

ans = [W，Z，X，Y]GydF4y2Ba

2개대해개개인수사용하여호출경우경우도도GydF4y2BaSymvarGydF4y2Ba은이을따릅니다。GydF4y2Ba

Symvar（F，2）GydF4y2Ba

ans = [W，Z]GydF4y2Ba

syms s t f = s + t;Symvar（F，1）GydF4y2Ba

ans = tGydF4y2Ba

SYMS SX TX F = SX + TX;Symvar（F，1）GydF4y2Ba

ANS = TXGydF4y2Ba