ode32用法的求助

21101244

<TABLE  cellSpacing=1 cellPadding=5 align=center>
. P. t0 ^7 E3 B& _+ B/ ~" V
& b# ~+ M9 @7 h/ s; B* ]<TR>
<TD class=tablebody1 vAlign=top width=*>
( M8 j! b- p, C+ Q: V6 ~( L7 _<BLOCKQUOTE>
( n, v; O3 j# D& t8 g# E3 c<TABLE  width="90%" border=0>

5 R. x6 I$ R; Q" y0 m9 J) b4 `<TR>
<TD  width="100%">
, p: N& J3 [6 d- W  j<TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>
3 e" m' z" R9 M; k2 R- [7 H7 o! Z# m
<TR>
<TD width=*>
8 Q) }6 E% X; H9 B; o& d$ s9 o<TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>

<TR>
. G2 r+ s' R9 Q. r( `<TD width=*><B>于ode32用法的求助</B></TD>
<TD align=right width=60></TD></TR></TABLE></TD></TR></TABLE>
0 h6 T2 u- O# P- f( }) M% k
<>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>
<>1.  function xp=harm(t,x);
! D, ^1 U  v) E& K2.  k=2*pi;
3.  xp(1)=x (2);
0 M# v& v! b0 e+ i7 }4.  xp(2)=-k*k*x (1);</P>
<>
! S1 g# E' t/ m&gt;&gt; [t,x]=ode23(harm,0,1,[0 2*pi])
??? Input argument 'x' is undefined.</P>
<>Error in ==&gt; D:\matlabtest\harm.m
On line 3  ==&gt; xp(1)=x(2); </P>
$ V. v- e* n" W8 w) M5 M0 J% [, A' q<>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>
<TR>
9 E4 a! Y7 q7 V! B5 M* Y# y<TD class=tablebody1 vAlign=center align=middle width=175><a href="http://www.madio.net/bbs/look_ip.asp?boardid=87&amp;userid=11201&amp;ip=*.*.*.*&amp;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>
<TD class=tablebody1 vAlign=center width=*>欢迎大家作客“矩阵工作室”
0 r0 Q2 U% H; n<TABLE cellSpacing=0 cellPadding=0 width="100%">

! c, q$ A5 J& j" b<TR>
5 h% G, G& A! V$ g2 n) K<TD vAlign=center align=left> </TD>
<TD vAlign=bottom align=right width=200 nowarp><a href="http://www.madio.net/bbs/post.asp?action=edit&amp;BoardID=87&amp;replyID=17564&amp;ID=3856&amp;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&amp;BoardID=87&amp;ID=3856&amp;replyID=17564&amp;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&amp;BoardID=87&amp;ID=3856&amp;replyID=17564&amp;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&amp;BoardID=87&amp;ID=3856&amp;replyID=17564&amp;userid=11201" target="_blank" ><IMG src="http://www.madio.net/bbs/Skins/Default/lockpage.gif" align=absMiddle border=0></A> </TD>
<TD vAlign=bottom align=right width=4></TD></TR></TABLE></TD></TR></TABLE>

1. &lt;SCRIPT language=JavaScript&gt;8 S- s3 V9 j) @$ K- M
   
2. 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'));
   4 d! j: P/ s/ r8 m' N
3. &lt;script&gt;

复制代码

- N0 u1 e* ]1 ?" k$ f<!--帖子浏览主体-->
$ ~) ~1 S$ I0 [& [3 W<TABLE  cellSpacing=1 cellPadding=5 align=center>

<TR>
<TD class=tablebody2 vAlign=top width=175>
<TABLE cellSpacing=0 cellPadding=4 width="100%">

6 ?' n  e1 ^9 I6 E<TR>
7 f4 _3 N; `) ?6 s<TD  vAlign=center width=*>  <FONT color=#000066><B>21101244</B></FONT> </TD>
2 \+ h5 N: x( R<TD vAlign=center width=25><IMG src="http://www.madio.net/bbs/Skins/Default/Male.gif"> </TD>
<TD vAlign=center width=16></TD></TR></TABLE>  <IMG src="http://www.madio.net/bbs/Images/userface/image1.gif">
) X9 Z5 g3 `5 G' f
! G8 z) P- J6 O2 M# w; p7 r* Y</TD>
<TD class=tablebody2 vAlign=top width=*>
: w  T  E- c' r: G<TABLE width="100%">

# x0 Z( W, V2 O, M* \$ F8 `<TR>
<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&amp;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&amp;nSearch=3&amp;keyword=21101244&amp;BoardID=87&amp;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&amp;BoardID=87&amp;replyID=17574&amp;id=3856&amp;star=1&amp;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&amp;BoardID=87&amp;replyID=17574&amp;id=3856&amp;star=1" target="_blank" ><IMG src="http://www.madio.net/bbs/Skins/Default/reply_a.gif" align=absMiddle border=0></A></TD>
<TD width=80>第 <FONT color=#ff0000>2</FONT> 楼 </TD></TR>
$ j1 u0 G$ w' D5 y4 g<TR>
<TD colSpan=2 height=1>
, j! x& I' U; D3 s/ N- r6 z( x<TABLE  cellSpacing=0 cellPadding=0 align=center border=0>
4 w+ x# U' Y& H
  T: C: N  [; f1 g2 i; U, L<TR>
<TD></TD></TR></TABLE></TD></TR></TABLE>
<BLOCKQUOTE>
<TABLE  width="90%" border=0>
5 q7 [9 j, @4 W6 g& x8 D' S
0 q2 p2 D* I2 m% s. m" A<TR>
4 z6 t, x0 L9 U. A9 {<TD  width="100%">
4 U1 {$ G3 ]7 s" Y2 Q<TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>

<TR>
; c+ k) h" m, K  u2 |( G, M  n<TD width=*>
<TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>

<TR>
<TD width=*><IMG src="http://www.madio.net/bbs/Skins/Default/topicface/face1.gif" align=absMiddle border=0> </TD>
, S# X5 U5 G) |2 t+ S2 Y+ m9 W9 r<TD align=right width=60></TD></TR></TABLE></TD></TR></TABLE>

4 C& @. n: q' n/ \4 ]<>[t,x]=ode23('harm',0,1,[0,2*pi])</P>
<>运行后提示必须返回一个列向量</P></TD></TR></TABLE></BLOCKQUOTE></TD></TR></TABLE>