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发表于 2010-1-21 10:08:15
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>> help ops / Y6 A- x1 E- N) m: w5 m# W
& o" d* H# R& h/ \, c Operators and special characters.
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( x* b$ e% f: P4 d3 c/ D2 O: l/ f Char Name HELP topic
~% N2 r: u; _! B7 D' Z: \. s" G8 n3 @3 {" T& v- E- P( @- w$ |1 L9 {& y
+ Plus arith [1 ?% o; ]4 n0 b3 {
- Minus arith- H' W2 n* e3 t4 N9 T9 \0 R* g
* Matrix multiplication arith, ^+ J: k" K* x' t8 C. h
.* Array multiplication arith
9 @! O, Q I' O8 H" x. C$ T7 S ^ Matrix power arith
5 f& g! h/ W4 W$ o/ A .^ Array power arith1 U: {1 o# C9 Z/ n! q1 S
* ?/ e$ W. @$ T6 F8 z7 g6 v \ Backslash or left division slash, T( }0 t- b* n# y
/ Slash or right division slash
) T$ C9 t5 B5 S7 n2 s6 G: y6 Z ./ Array division slash$ g- x+ c, q0 w% B% z* a1 J. j% Z
kron Kronecker tensor product kron f0 ~& S" I: r- @2 v4 t0 M
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: Colon colon" c5 W5 @0 l; T8 m2 H! q8 T
# H) }6 P1 N6 }0 ^" {5 T' j ( ) Parentheses paren/ G/ Q$ p: N% K& L
[ ] Brackets paren
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. Decimal point punct
& D: X6 X$ [1 l( L& m) l .. Parent directory punct
& S; U- s4 u. _, W' V ... Continuation punct4 H X+ ^6 m3 [: W
, Comma punct
4 \. C1 a0 [3 r$ F ; Semicolon punct2 S) }, ~) w- ?) v1 v1 R
% Comment punct
* B, Q3 c; h* E. J ! Exclamation point punct8 M: c( e6 c B$ Y8 l% d* y# ^
' Transpose and quote punct# n$ D' k( v' [
= Assignment punct
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== Equality relop
9 f) Q! s2 D! H% P6 K5 G7 L <,> Relational operators relop' K' K: z% o) U
& Logical AND relop, P0 P Q; d# q/ {8 W0 q1 Y
| Logical OR relop9 M+ W! R/ N: x! `! a. V" y' i
~ Logical NOT relop
5 Q' ~, H. u4 w% P! X$ w xor Logical EXCLUSIVE OR xor
- \% F( J1 C- E8 b2 ]" c; c% O4 w, ^' z" {2 b9 L0 b
Logical characteristics.
5 r" d! w* x {4 D: z! T( R exist - Check if variables or functions are defined.
4 I0 a4 }5 L# U, Y& L) p7 J* p any - True if any element of vector is true.
2 i0 g- E3 D+ `8 {0 m0 @4 x0 M V all - True if all elements of vector are true.8 c' S4 C1 P' v# U9 z2 |
find - Find indices of non-zero elements." F4 ~# f* j' \0 l0 e6 }
isnan - True for Not-A-Number.. `- \ ?4 g7 O& n% R+ u
isinf - True for infinite elements.# w1 {: u B5 q1 d/ t9 k- i3 G
finite - True for finite elements.
( k# f$ r: N9 c, p+ ?- n: w isempty - True for empty matrix.
# L5 r' t. q4 J& l0 t" z# d isreal - True for real matrix.3 R2 V9 f$ k7 b$ a+ `: F
issparse - True for sparse matrix.
s" o- W+ [9 h3 `7 n isstr - True for text string.
% Z, M2 H/ e9 f7 g! X; ~ isglobal - True for global variables. |
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