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发表于 2010-1-21 10:08:15
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>> help ops : @% \5 x3 E) |; e; `! \5 Q
. B! Y8 L. N6 r5 S# X. z Operators and special characters.2 V" u; @1 K% ]' Z, j6 J- Q
* k+ p# Z C, c+ R8 _# t. ~4 V Char Name HELP topic, u2 o/ M5 _+ I! J7 m4 }
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+ Plus arith
/ C% f: t! W; S, B3 I - Minus arith$ z/ |# I' I! {/ l/ R( W X
* Matrix multiplication arith
5 e2 C j3 k* ~" n .* Array multiplication arith6 h- H& v6 P) t
^ Matrix power arith
8 i6 i+ G: j2 ~9 A. `7 H" r .^ Array power arith9 i2 {3 H, g( E2 ~0 }! B; s
4 k4 E" a3 v* `/ a \ Backslash or left division slash
3 Q; d3 h0 N' G9 I2 V) l' s1 n / Slash or right division slash
8 F: q( O$ c) B ./ Array division slash& j0 S9 u$ t, x; i
kron Kronecker tensor product kron
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1 i6 o, q& u6 o. }/ q) X : Colon colon
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' g0 i! E5 G* w% O0 a ( ) Parentheses paren6 H" ~0 C7 K& N: c5 ~5 ]; P
[ ] Brackets paren7 M( c7 o) t+ y, N
' q2 J3 B& E/ S! O( g . Decimal point punct
3 p' n6 O- T2 M .. Parent directory punct2 A" I+ P6 U6 ]/ u5 {
... Continuation punct
& V" Z( U& ~, S8 o* b1 ^3 F- U! \ , Comma punct
: Z8 G4 n+ |& j5 |% ]$ |+ u; H ; Semicolon punct! a I3 X" h/ C" o: K
% Comment punct7 A% v8 V" f" U' j( v
! Exclamation point punct
: [. t# c1 E* V) M, E ' Transpose and quote punct
9 j4 f8 D$ r; O- s# L( p = Assignment punct
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== Equality relop
6 l6 l0 o/ V% v. ]$ ]9 F9 ~4 L <,> Relational operators relop
+ I2 |; N3 a3 N1 ]3 [ & Logical AND relop
% j9 c5 d# ]1 I' a5 _/ M5 ~ | Logical OR relop
2 M$ l/ K) q/ m9 Z5 N: Y ~ Logical NOT relop
3 j; g6 L: u2 R3 d: Y' Y4 y: K& x xor Logical EXCLUSIVE OR xor
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* X" z$ d$ Q3 y+ c/ x Logical characteristics.
: _8 n' E; ?5 ?6 Y. e, \7 D( J& H A exist - Check if variables or functions are defined.
9 D: |( `0 U% Z" i9 @ any - True if any element of vector is true.
, D0 f) x q9 {; L: U$ i all - True if all elements of vector are true.; [. G( C r6 f$ A$ A
find - Find indices of non-zero elements.
) _; `; w4 y2 n isnan - True for Not-A-Number.3 ], d7 p- A% ^# Z6 d+ Y
isinf - True for infinite elements.
8 t; e- ], ?" t* L; F0 R finite - True for finite elements.
" A+ L, P! h. W# A( y& C$ ? isempty - True for empty matrix.$ m4 d' y1 x3 B
isreal - True for real matrix.
( q9 x+ a8 b$ b9 t& g issparse - True for sparse matrix.
8 m- H, k- ]0 ~ isstr - True for text string.
. \! w$ R. I' e- O isglobal - True for global variables. |
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