7 y) W. w% y, u, T0 ^maple( 'A intersect B ' ) 求集合A和B的交集 & \- L8 K7 V, `6 d; ` n * X: d" o$ w9 ], }1 `* R$ a/ @6 b9 Rmaple('A minus B ' ) 求差集A-B 8 v% t1 t5 V8 i% Z' [! e9 v. Q5 L" A' E! w8 Q
maple( '全集I minus A ' ) 求集合A关于全集I的补集 , r( \- B( `; [% J# x0 i + t4 R8 }4 E9 ?7 ?2 \如何用matlab排序 ( Q* l- s! {- n! x# m1 ?" m& r / z1 C& x) q# b% Rsort(v) 将向量v的元素从小到大排列(升序排列)作者: madio 时间: 2009-9-9 02:18
Symbolic Math Toolbox maple * w. N2 z, F9 c, T7 j8 Y
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Access Maple kernel & z* F; p+ w5 ]4 r
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Syntax4 C6 |; o; U2 s8 j) n- U& d
' S$ e6 x" c! R$ _2 gr = maple('statement')) S. k. M: \7 Q( y
r = maple('function',arg1,arg2,...) $ T9 v% C, P/ ], I[r, status] = maple(...)0 \/ b( X- l" Y* B3 m; m- k
maple('traceon') or maple trace on 3 P$ X9 W2 H8 W; l$ [/ U& @maple('traceoff') or maple trace off$ O& L; ]6 T$ K. w$ k. n
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N6 R( I" j/ n* A7 {6 lDescription 5 t( J, a" {. X* W : c5 T1 H3 \( n2 X* H5 R b0 f: w A# |
maple('statement') sends statement to the Maple kernel and returns the result. A semicolon for the Maple syntax is appended to statement if necessary. : g& y3 l" u+ S. V
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maple('function',arg1,arg2,...) accepts the quoted name of any Maple function and associated input arguments. The arguments are converted to symbolic expressions if necessary, and function is then called with the given arguments. If the input arguments are syms, then maple returns a sym. Otherwise, it returns a result of class char. 6 Y# [+ t9 j0 j0 V9 x% o) B2 h
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[r,status] = maple(...) is an option that returns the warning/error status. When the statement execution is successful, r is the result and status is 0. If the execution fails, r is the corresponding warning/error message, and status is a positive integer. - T* P' q- L _- b. c, R# u( R: ^' ]
maple('traceon') (or maple trace on) causes all subsequent Maple statements and results to be printed. maple('traceoff') (or maple trace off) turns this feature off. ! W+ w( f' s* m5 z# ?( w9 N 3 J# q* J5 {, F; n/ @& t3 W3 LExamples # B0 N* Q; J& @2 S4 Y5 m% D( ] H3 L a, S, ]9 h
/ @8 G" u+ d! q* D) EEach of the following statements evaluate to 100 digits. 1 T( h4 G" A; z& L m# y' u1 Hmaple('evalf(Pi,100)') 3 a) J3 {0 u! `+ L6 a4 V D( rmaple evalf Pi 100$ @4 `' o) T6 j$ Q) {- i
maple('evalf','Pi',100)0 g3 Q( k3 A* p& W2 Y, y- N' Y
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The statement : A: R! k, V8 `5 W* K3 f
[result,status] = maple('BesselK',4.3) Y8 }! M$ j$ E5 \6 w4 ] 0 i7 _6 m: |+ \6 g ; B1 `' b5 \/ k! } {6 ?5 S6 f5 b) Z* q8 q9 `
returns the following output because Maple's BesselK function needs two input arguments. 3 [9 n. m- J$ f/ W Z! Dresult =$ D- k9 ^* n/ \. H# Q3 s
Error, (in BesselK) expecting 2 arguments, got 1! d. R7 Q. _: h; D6 ]
status = / i+ T L) M6 l+ I9 [2% M2 D1 X3 j/ v2 o9 ]5 i/ M
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* \5 Z* T# S( y2 Y4 {& CThe traceon command shows how Symbolic Math Toolbox commands interact with Maple. For example, the statements 2 W1 U! j K( G: |syms x# R0 v, V6 S2 R8 D
v = [x^2-1;x^2-4]' Y- k( m9 e- P5 j; y
maple traceon % or maple trace on# i7 P# ~2 ?- c. L0 {
w = factor(v) / e4 [5 U7 R7 O8 e( l1 G! ]% P" C7 p% `3 K/ V: x) I
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v =4 h0 H* W& G" d4 H' M
[ x^2-1] f% }2 {9 q* h3 L8 r1 z" k
[ x^2-4] & i5 {! E; X( x( } * I6 I8 Q: D( I& d; u A# L
statement:, d# O3 f0 x* N
map(ifactor,array([[x^2-1],[x^2-4]]));/ {) k& D/ @4 B1 f, p
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Error, (in ifactor) invalid arguments 7 ~2 }" ?* C- n: D0 o a, U! o4 K6 ystatement: - X( m4 o: e, V; r9 K, U" k' n map(factor,array([[x^2-1],[x^2-4]])); 5 B+ O$ W6 L7 R# E, S7 S# _result:$ D3 _9 l- ^; V' b) R
matrix([[(x-1)*(x+1)], [(x-2)*(x+2)]]). `+ D8 u u0 w5 Z9 J
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w =! b8 Z V, C* f1 t) O) i! p6 {
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[ (x-1)*(x+1)] ( X) W5 R" `& G[ (x-2)*(x+2)]9 F' G4 W+ d- X. a i, o) E3 }
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This example reveals that the factor statement first invokes Maple's integer factor (ifactor) statement to determine whether the argument is a factorable integer. If Maple's integer factor statement returns an error, the Symbolic Math Toolbox factor statement then invokes Maple's expression factoring statement. ; ]8 N" L4 D. p9 V8 H! m" F 2 T2 J0 ?0 I% I/ ]7 h# tSee Also 2 s( }1 @! Q, }' C/ X1 C0 y5 E ) l* c1 a! U4 n: S; L8 P \5 w# S X% t% S1 f: ?
mhelp, procread作者: suolunga 时间: 2009-9-10 13:30
学习了! ! W. L0 d5 X, F9 O谢谢!!!!!!