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发表于 2010-1-21 10:08:15
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>> help ops 6 q4 W& S4 L! E* j' z7 u. }
: V) i4 t- S5 g Operators and special characters.4 B0 j9 b8 W# e4 r* ? P- e
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Char Name HELP topic! J0 r6 |1 [4 P% k2 d1 ^
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+ Plus arith2 M: n" M: _: w3 b
- Minus arith
6 l" U) Z7 Y- H * Matrix multiplication arith
' L" h8 l- Y( f .* Array multiplication arith
" N4 e6 X' g' u0 n# _1 }3 k ^ Matrix power arith
' B& M( t; X1 h+ J$ \, _ .^ Array power arith0 J8 V. i; a$ U% s" a
8 o+ I. a" I+ M+ O( ] \ Backslash or left division slash
3 b" ]% s3 r- P$ [0 I / Slash or right division slash. w6 ^+ F" R% n, i; ~) c2 \
./ Array division slash
$ {8 Z4 W7 W' q8 N kron Kronecker tensor product kron
3 H$ J! y1 V5 N6 j' t' I4 d% O9 {6 K8 q: ^0 v
: Colon colon6 q# z. s6 [! J# S! ?
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( ) Parentheses paren
% z6 s3 e, o$ v, \ [ ] Brackets paren
4 a4 b* I- c6 r) V2 ]/ @8 K) _5 Y$ m+ ?! Z f8 P @
. Decimal point punct, T2 Y4 n- J8 H7 O2 ? n, ?
.. Parent directory punct8 Q8 C+ y! g' c B
... Continuation punct
5 l. p# B; I z5 \ , Comma punct4 Y1 v# w5 I' _* N
; Semicolon punct
R' Q0 [4 t: w8 B0 A % Comment punct
) j5 R# `" Q2 g, h& O7 a# u% v3 \ ! Exclamation point punct
& ?9 w1 n$ T' M/ {% i/ w/ o# I ' Transpose and quote punct
9 Y- V; i1 N Q = Assignment punct% T: X& {* Y0 C6 I9 D+ _5 R
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== Equality relop
" i% Y5 v5 h {' V! e: z: P <,> Relational operators relop( [! l* F* e4 W2 B2 _
& Logical AND relop, Z8 j# W2 E# E: D8 Z. z( Z
| Logical OR relop
0 D% ~3 z! e% ?" H ~ Logical NOT relop
* @. N, R1 F3 a }9 r xor Logical EXCLUSIVE OR xor
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Logical characteristics.
+ U" o: F" l1 Q, C' n: p: s2 F- q exist - Check if variables or functions are defined.* ~, w1 Q* f8 V6 ?
any - True if any element of vector is true.$ S4 Z* g% c" X& M& Q
all - True if all elements of vector are true.
( O$ Z" R S* E/ ~6 n* X find - Find indices of non-zero elements.3 V; w/ F* c" \' c8 B+ e0 m, ]( m
isnan - True for Not-A-Number.
5 q3 h3 q$ d; k/ o' f. m isinf - True for infinite elements.
# O+ Y* v @9 a% J7 R( m4 G# _ W" g2 @ finite - True for finite elements.
6 l1 X* h% P2 i s7 J isempty - True for empty matrix.
: _3 B) [! i% W( S isreal - True for real matrix.% p8 I* P/ F7 L! B( _. |: ]; e
issparse - True for sparse matrix.
- |$ n1 l/ R+ P. A isstr - True for text string.
- E* l7 U$ M3 j isglobal - True for global variables. |
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