在线时间 0 小时 最后登录 2005-4-13 注册时间 2005-4-8 听众数 0 收听数 0 能力 0 分 体力 66 点 威望 0 点 阅读权限 20 积分 22 相册 0 日志 0 记录 0 帖子 4 主题 2 精华 0 分享 0 好友 0
升级 17.89%
该用户从未签到
<TABLE cellSpacing=1 cellPadding=5 align=center>
3 y5 H! a7 ^4 {" C! o
: P& R0 l. e O5 G/ E; C+ | <TR>
3 m' }1 u1 {1 s; V+ w9 e0 }( g3 w <TD class=tablebody1 vAlign=top width=*>
. z7 M8 d \9 C: `( }/ f <BLOCKQUOTE>0 i$ J2 w6 W7 _. s: ^" Y7 C
<TABLE width="90%" border=0>, B) _& b6 D0 w3 Q2 Y
! G' a/ w6 x9 ^
<TR>
" B% y3 f' Y& F; E; n3 s% A7 u$ I' r <TD width="100%">' c2 a; Y5 D! f; g! C+ @( _4 b
<TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>
6 C3 r& B. M5 q2 p( H; \
) ]# E' ` ~) [" Z. I <TR>5 B' }" a* l+ {! [! m' z$ s$ t: K
<TD width=*>8 `- g( ^; `$ b0 C
<TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>
w; q B; K" a$ w$ B* W 2 l4 b5 q" Z+ y( ~) E
<TR>
4 [8 n$ V3 k; F% i" ]5 S4 j: X <TD width=*><B>于ode32用法的求助</B></TD>
7 ~" s0 ?2 o) F5 w: } <TD align=right width=60></TD></TR></TABLE></TD></TR></TABLE>2 s/ d) }" S8 N) Q8 T
: c+ `7 m7 N0 g
< >在求解常微分方程X"(t)+k^2*X=0的过程中遇到的问题,很是郁闷!!!!!!!</P>
4 f3 s I( q4 }2 p! r# m < >1. function xp=harm(t,x);' Y0 M3 P2 W5 H
2. k=2*pi;
6 x0 D9 [, Q; D 3. xp(1)=x (2);; h: w3 i9 @9 }9 ~ \
4. xp(2)=-k*k*x (1);</P>7 U6 N2 E( A8 V- i' }& v$ F2 d
< >% \- O8 A6 V& l- ?# G
>> [t,x]=ode23(harm,0,1,[0 2*pi]). K) W6 G$ A! n' G7 _- G3 c
??? Input argument 'x' is undefined.</P>8 [: @9 G6 d( f1 {% _
< >Error in ==> D:\matlabtest\harm.m S8 M* @: X7 Y! Y. G# ]% `
On line 3 ==> xp(1)=x(2); </P>/ v" M4 \9 Y7 T$ h
< >总是提示”输入参数X未被定义”,可是很多书上都是这么写的可以求出来树枝解,恳求各位大侠指点!!</P></TD></TR></TABLE></BLOCKQUOTE></TD></TR>, V4 F& Y) I6 b& I$ g
<TR>
: O; Z( J; w! |5 V Y- L: d <TD class=tablebody1 vAlign=center align=middle width=175><a href="http://www.madio.net/bbs/look_ip.asp?boardid=87&userid=11201&ip=*.*.*.*&action=lookip" target="_blank" ><IMG src="http://www.madio.net/bbs/Skins/Default/ip.gif" align=absMiddle border=0></A> 2005-4-12 13:14:36</TD>
4 G2 s9 {+ t, F. ] <TD class=tablebody1 vAlign=center width=*>欢迎大家作客“矩阵工作室” 0 p. R$ @! \" D9 O4 Q$ a
<TABLE cellSpacing=0 cellPadding=0 width="100%">% H. |3 g' J8 a/ A- l% o% [
6 {- S. }2 x; ?
<TR>
7 W4 S0 w! T5 f7 T8 L) }2 q <TD vAlign=center align=left> </TD>
1 ?" R" t p8 y' R0 w <TD vAlign=bottom align=right width=200 nowarp><a href="http://www.madio.net/bbs/post.asp?action=edit&BoardID=87&replyID=17564&ID=3856&star=1" target="_blank" ><IMG src="http://www.madio.net/bbs/Skins/Default/edit.gif" align=absMiddle border=0></A> <a href="http://www.madio.net/bbs/admin_postings.asp?action=复制&BoardID=87&ID=3856&replyID=17564&userid=11201" target="_blank" ><IMG src="http://www.madio.net/bbs/Skins/Default/copy.gif" align=absMiddle border=0></A> <a href="http://www.madio.net/bbs/admin_postings.asp?action=精华&BoardID=87&ID=3856&replyID=17564&userid=11201" target="_blank" ><IMG src="http://www.madio.net/bbs/Skins/Default/jing.gif" align=absMiddle border=0></A> <a href="http://www.madio.net/bbs/admin_postings.asp?action=单帖屏蔽&BoardID=87&ID=3856&replyID=17564&userid=11201" target="_blank" ><IMG src="http://www.madio.net/bbs/Skins/Default/lockpage.gif" align=absMiddle border=0></A> </TD>- H+ c( Z4 }2 J: |; e G
<TD vAlign=bottom align=right width=4></TD></TR></TABLE></TD></TR></TABLE>
1 C: F& x, {9 h1 t% M <SCRIPT language=JavaScript>
7 W+ r/ G2 d* a6 b6 q \4 K var actioninfo3='单帖屏蔽';document.write (dvbbs_show_topic('17574','87','21101244','','','21101244@sina.com','||||||||||||||||||','','Images/userface/image1.gif','','','','','<P>[t,x]=ode23(\'harm\',0,1,[0,2*pi])</P><P>运行后提示必须返回一个列向量</P>','2005-4-12 15:29:00','face1.gif','*.*.*.*','3856',1,0,11201,2,'新兵训练','32','32','2','2005-4-8','8','58','36','','1',0,'0','level0.gif',4,'2005-4-12 15:25:47','0',1,'tablebody2','1','0','2','0','','0'));& r$ k+ [4 q( Z. V! ?4 R
<script> 复制代码 ) S$ e- |) Y' F- q7 S, y( i
<!--帖子浏览主体-->
. h! ]. D9 W, K1 J# t. h <TABLE cellSpacing=1 cellPadding=5 align=center>
! Y- {5 D" y9 s* j3 M& u9 I5 Z$ s ! R$ q0 M6 D) h1 [
<TR>
$ E; ?' P6 \! Z+ k. k <TD class=tablebody2 vAlign=top width=175>
. T" \: h2 h$ ] <TABLE cellSpacing=0 cellPadding=4 width="100%">
" S* p/ a% ^# `* J9 W9 N + F& R( c) F, |
<TR>
9 O8 v6 O# a' X" G* z( l$ N7 p <TD vAlign=center width=*> <FONT color=#000066><B>21101244</B></FONT> </TD>6 N# @- o* ]+ J8 B- I# ]+ z! _4 S" [: F
<TD vAlign=center width=25><IMG src="http://www.madio.net/bbs/Skins/Default/Male.gif"> </TD>
! o4 U: J; y: o6 |& a <TD vAlign=center width=16></TD></TR></TABLE> <IMG src="http://www.madio.net/bbs/Images/userface/image1.gif">8 n, `3 X7 _/ i# g
7 T2 }( Y8 d1 V9 r
</TD>8 n" S5 F+ H0 b
<TD class=tablebody2 vAlign=top width=*>2 _5 H4 P5 w& W1 c. i v
<TABLE width="100%">
3 ~, @# Y" j& r" E8 S% ?0 P3 o1 J ' ^- ]' K+ n- r0 I
<TR>
, c5 I- h. @. q3 i <TD width=*><a><IMG src="http://www.madio.net/bbs/Skins/Default/message.gif" align=absMiddle border=0></A> <a href="http://www.madio.net/bbs/friendlist.asp?action=addF&myFriend=21101244" target="_blank" ><IMG src="http://www.madio.net/bbs/Skins/Default/friend.gif" align=absMiddle border=0></A> <a href="http://www.madio.net/bbs/dispuser.asp?id=11201" target="_blank" ><IMG src="http://www.madio.net/bbs/Skins/Default/profile.gif" align=absMiddle border=0></A> <a href="http://www.madio.net/bbs/query.asp?stype=1&nSearch=3&keyword=21101244&BoardID=87&SearchDate=ALL" target="_blank" ><IMG src="http://www.madio.net/bbs/Skins/Default/find.gif" align=absMiddle border=0></A> <a href="mailt21101244@sina.com" target="_blank" ><IMG src="http://www.madio.net/bbs/Skins/Default/email.gif" align=absMiddle border=0></A> <a href="http://www.madio.net/bbs/post.asp?action=re&BoardID=87&replyID=17574&id=3856&star=1&reply=true" target="_blank" ><IMG src="http://www.madio.net/bbs/Skins/Default/reply.gif" align=absMiddle border=0></A> <a href="http://www.madio.net/bbs/post.asp?action=re&BoardID=87&replyID=17574&id=3856&star=1" target="_blank" ><IMG src="http://www.madio.net/bbs/Skins/Default/reply_a.gif" align=absMiddle border=0></A></TD>4 P( I) s+ b( D0 ]7 H
<TD width=80>第 <FONT color=#ff0000>2</FONT> 楼 </TD></TR>
' c$ `8 V Z. T2 w5 |" q c5 r <TR>& F4 ^* {2 n- {5 v8 H5 O
<TD colSpan=2 height=1>: l, n f! i* C, i" T( V; x
<TABLE cellSpacing=0 cellPadding=0 align=center border=0>
5 d( S3 M6 s# c7 B& s7 M- c1 Q ; h" R) ~' c9 R- r6 e. h
<TR>9 g7 y6 Y7 G, R- }
<TD></TD></TR></TABLE></TD></TR></TABLE>5 M- t" M5 Q* `
<BLOCKQUOTE>' J: Y. ~+ h4 u' b' {/ T
<TABLE width="90%" border=0>8 |. m) [- B8 H% F |* R" F t/ J
1 t4 o% ]" k$ _8 u- q
<TR>; c, L+ j2 }% d
<TD width="100%">. |1 B5 c# i7 ~" D1 M
<TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>
: V) i# u8 w0 K0 F% I
1 p& d/ o' X) v0 f k <TR>) }1 {0 `0 { f8 w8 _. D
<TD width=*>
1 F# y3 [+ }! Z, X$ } <TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>( q/ ~/ F' j! q" F& r: M8 s8 @
9 V7 c! T* K1 Q' w* s$ B
<TR>5 c0 l$ G2 v; v$ e; B$ J6 \, o
<TD width=*><IMG src="http://www.madio.net/bbs/Skins/Default/topicface/face1.gif" align=absMiddle border=0> </TD>
; o9 Z" q& u/ r0 b6 }' q <TD align=right width=60></TD></TR></TABLE></TD></TR></TABLE>! U4 O$ e Z% t' U
* `% E) p* R T& [
< >[t,x]=ode23('harm',0,1,[0,2*pi])</P>
( c& \6 q' }2 f' s < >运行后提示必须返回一个列向量</P></TD></TR></TABLE></BLOCKQUOTE></TD></TR></TABLE>
zan