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发表于 2010-1-21 10:08:15
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>> help ops 1 c$ L% t% H; Q! R/ _
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Operators and special characters." g% {- L, b! C/ @# T6 [1 j
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Char Name HELP topic% C7 f7 G5 y" B% x' ~
5 O d, g5 Y9 G3 c8 B! P: F + Plus arith# ]: U$ D/ X8 Y# V
- Minus arith
8 I! E; i& F% y4 c, B2 u * Matrix multiplication arith/ Q$ [4 y( ^6 e8 W0 A
.* Array multiplication arith+ U: ^' z5 p1 c$ f- _. @& l
^ Matrix power arith s5 i j9 g4 Y
.^ Array power arith
' v: G& E, c) |0 z0 L" a. @) }& F( D/ D+ h
\ Backslash or left division slash# z" ^; v, [8 U- b( m9 o
/ Slash or right division slash
- f0 N7 e9 t6 q ^' x0 P ./ Array division slash/ P6 T' d1 x' O9 u7 g# o- h
kron Kronecker tensor product kron
0 a( k# P& A* Q. K3 `; p% r5 G2 s4 Q. D l' i, _/ ]
: Colon colon
4 D4 i. k6 R4 ~, W+ [
9 r# i" Z: |& f( k2 y, f/ y; B- R9 q ( ) Parentheses paren1 {* O: }* S: i: D* g$ W
[ ] Brackets paren6 p6 ]( P3 U1 L8 T: b$ S6 q
( M% L/ g& s: F7 W/ r1 |! m . Decimal point punct9 B T" w8 I7 P" D
.. Parent directory punct$ ^- h- O+ \) c' i) L2 ^
... Continuation punct$ M: ^/ ^4 u6 c+ L4 Y2 ]4 v4 X
, Comma punct( a! h( f5 u4 x- K0 [
; Semicolon punct
# R8 j) _! [' Y- u % Comment punct) x d& v3 U- m, g( B9 ~7 Z7 x
! Exclamation point punct, h) W7 ?8 u4 ?% I4 ~
' Transpose and quote punct+ b" x$ @& T; _* Y9 x! }: m
= Assignment punct! i F: X% C7 K$ @
$ O- J* L/ W4 U9 `# V
== Equality relop
) J* e7 i9 ^3 ] e <,> Relational operators relop) F! V4 W6 M, j2 O" q& O+ n
& Logical AND relop9 y5 r( P: ^/ g0 d
| Logical OR relop+ k8 l _" G0 M6 u& w5 @; {' U
~ Logical NOT relop
: V. @) J1 b4 i) x3 R xor Logical EXCLUSIVE OR xor- e6 d7 W3 N3 Y" `3 j
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Logical characteristics. e0 R! @/ V6 `
exist - Check if variables or functions are defined.& k! o( C2 Y. p, j2 T/ C5 k- K
any - True if any element of vector is true.
5 E. H: c" W6 F9 y. j4 ~% b7 ? all - True if all elements of vector are true.
$ D# N; z/ p( q5 K5 H( M/ _/ X find - Find indices of non-zero elements.( H9 ^% z7 P1 c1 D$ t
isnan - True for Not-A-Number.
3 a5 G& d/ O! G$ x isinf - True for infinite elements.$ r P* o% x# X; x
finite - True for finite elements.+ D ~ Z5 }0 t
isempty - True for empty matrix.! J; J" [: f6 d: c! C e5 E* O! o, |
isreal - True for real matrix.3 Y& V. C: _9 C5 p) U; o. L5 X( o v9 t
issparse - True for sparse matrix.
$ u" O: d: B- n9 I3 r; k isstr - True for text string. X" B1 c# Y/ \8 ^! |
isglobal - True for global variables. |
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