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发表于 2010-1-21 10:08:15
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>> help ops 6 V, ?5 g6 X' ]( D4 F, i0 |1 k
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Operators and special characters.# A: q# C3 z7 u" T8 s C4 ?: J7 o* W; ?
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Char Name HELP topic
& k9 W6 S# o; T/ h/ z; Q9 r$ s0 ~3 `, ~4 u+ N# G& Q/ H
+ Plus arith( O3 y. _: c4 g: P4 W
- Minus arith: B0 p7 s U v1 x; W# \; ?. h
* Matrix multiplication arith" z& G# c9 N0 `9 j3 U) ]6 S$ H- F2 t
.* Array multiplication arith+ y8 m6 p7 n: G: g' D
^ Matrix power arith3 w3 B" I! J% @
.^ Array power arith$ P( X$ a1 [$ I% K6 k5 e
# a' c' y4 q( p8 z- r `, _
\ Backslash or left division slash% F7 K& F* [4 W/ O
/ Slash or right division slash
z1 F4 X7 O A2 |4 T" Z ./ Array division slash
, I8 U3 i! }" A1 Q kron Kronecker tensor product kron9 E# k+ @' b& b0 V) a7 [, C
% \, `6 _% g9 ~, d- E: p. [5 X : Colon colon
# ]$ L) U6 O# ~
) T9 W( C0 l2 l0 m/ Z ( ) Parentheses paren8 d. \2 X, c' n
[ ] Brackets paren
- [; l& n) x; J e+ H% M! W% i; C, X2 O3 J; v
. Decimal point punct8 M3 r7 f( l7 _4 J7 L
.. Parent directory punct9 A# Z2 P9 I( P4 R. e9 `4 r
... Continuation punct
) W6 A6 O9 l3 s, |$ h/ X1 `* J N: H5 { , Comma punct
& g% M( q- N5 e, x3 q ; Semicolon punct$ V, g! Y3 i; w$ j
% Comment punct
* d# t* Q6 a; H) F' E. O7 J ! Exclamation point punct
. E. t9 v( @2 ~- X ' Transpose and quote punct
/ I' ~, e8 K% R4 [6 P; r. x = Assignment punct3 [, E7 S/ y- P/ {" j3 R/ t' F
6 o/ N+ [: m) G5 M == Equality relop4 ~& Q+ W Q* N8 }
<,> Relational operators relop
2 f' r2 O S" R & Logical AND relop
% Z [) ~6 {. K; H( `( Y/ x | Logical OR relop
- L$ q8 q" t+ o3 v( Y6 o/ K' u ~ Logical NOT relop
9 c' z8 l4 S( o' B# j xor Logical EXCLUSIVE OR xor6 k: [& E8 {* R5 ?- x: P
2 a J1 t# G* M3 d+ E Logical characteristics.+ d. E( X, G. I* E x) g& S
exist - Check if variables or functions are defined.( i9 ]9 Q4 d) q# I5 b. J7 T- ?
any - True if any element of vector is true.
+ k* |/ b" J2 i" J! J& b6 v8 X all - True if all elements of vector are true.& N1 D! ~9 M1 `% t. M
find - Find indices of non-zero elements.
I3 A0 [/ N T0 I isnan - True for Not-A-Number.
+ h% `" u ^1 x- H isinf - True for infinite elements.9 K# Q. F& I7 z2 g
finite - True for finite elements.2 Z* M7 ^+ J: _: m2 o8 ]
isempty - True for empty matrix.1 _* v4 t3 f4 q
isreal - True for real matrix.' W$ h* _* x" W$ a2 C
issparse - True for sparse matrix.
% `2 e+ m8 c0 n3 W isstr - True for text string.
; m0 O5 v6 n) A5 B1 ~0 ` isglobal - True for global variables. |
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