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发表于 2010-1-21 10:08:15
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>> help ops
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Operators and special characters.
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, t1 D1 g; {* Z( i! e* r Char Name HELP topic! C' d* J7 [: `3 [2 Y0 O" ~
! J7 w; e0 W8 _$ j + Plus arith
+ ]9 B% I1 V O# ?2 ]( j - Minus arith. y e- |0 E2 f) Z; p* p6 J8 V
* Matrix multiplication arith
$ S: j; @' O" n' o) D2 y .* Array multiplication arith5 m6 j% k4 o( M" ?9 `( i
^ Matrix power arith/ g l0 T5 b& w3 \
.^ Array power arith' p+ @1 J s) b% r$ F! M; t* l# w3 h
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\ Backslash or left division slash" X6 S+ u# ] u, \- T
/ Slash or right division slash7 {& {4 C0 X+ [$ Z+ h
./ Array division slash
, g/ m6 D6 D" ], V kron Kronecker tensor product kron4 u& ]" x9 c& L$ A j! b/ k
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: Colon colon
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( ) Parentheses paren. z5 u1 C& w' }( G7 U
[ ] Brackets paren
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. Decimal point punct* \ C( K- `3 x; z
.. Parent directory punct
2 h, y4 t) l. Z2 ~9 I9 y/ w ... Continuation punct9 a3 V9 H2 e; F# Z" A7 {+ P
, Comma punct+ k5 h- d: K4 D1 K* p$ q2 V9 B
; Semicolon punct
& K* N/ n3 u! V* z9 W$ x3 v! o % Comment punct
! _+ B$ S1 d/ X5 {2 W ! Exclamation point punct c9 A- k( v5 y$ |
' Transpose and quote punct9 W8 J# m s2 Z& x
= Assignment punct& U6 U1 s3 J1 r% O, |3 a/ R
. X6 t" n& O* k/ n" |: P == Equality relop
. r0 L0 B, c& }7 `, f# [ <,> Relational operators relop; ~8 y% L8 N( ?: ~
& Logical AND relop' G6 X s# p2 H/ S9 h- `
| Logical OR relop/ f' B& p E* B5 U/ B& }, z; L
~ Logical NOT relop" W. I; b1 \0 N2 t$ b& A7 ^
xor Logical EXCLUSIVE OR xor/ s+ w |" d2 l. Y& T
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Logical characteristics.# M v" l @6 K, a' f: {! N Y
exist - Check if variables or functions are defined.* M& {: f- v* ?* o
any - True if any element of vector is true.
, h* ]) v% n0 {4 r all - True if all elements of vector are true.
1 x, d# T0 B" s9 K find - Find indices of non-zero elements.
* U8 y& a0 Z4 x isnan - True for Not-A-Number.
% r. T# e# z) Y+ ~5 Q2 K9 b isinf - True for infinite elements.7 q3 I" E! \. y6 o L% F0 Z* y
finite - True for finite elements.0 Z0 V6 k P' X5 P- R
isempty - True for empty matrix.+ q- M" c+ {( X" y: b
isreal - True for real matrix." N% d3 F$ a3 [" P7 T
issparse - True for sparse matrix.
: P$ U0 u7 z# X+ I1 V* s: W, _0 O isstr - True for text string.% r4 a8 @; Q3 D
isglobal - True for global variables. |
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