ode32用法的求助

21101244

<TABLE  cellSpacing=1 cellPadding=5 align=center>
4 z9 ^( N( }5 d% g/ P& S
7 L' f( r4 ^6 b. j" D% J( j7 w<TR>
- S, n; X% u! A+ H" G<TD class=tablebody1 vAlign=top width=*>
( O8 j3 R# W8 ]7 y8 }<BLOCKQUOTE>
<TABLE  width="90%" border=0>

3 C  W5 I) v5 E  Y<TR>
<TD  width="100%">
8 q$ r+ h* y8 p6 W( J: T% n, F5 u<TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>
1 F# F8 E$ I( f: C; g% ^! A7 K6 C( c0 N
% J9 k9 \5 V5 @<TR>
, i% s* {& [5 b. U<TD width=*>
* S2 k' z% e" k5 y<TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>
) v& y- O3 T/ I$ @+ x) _
<TR>
<TD width=*><B>于ode32用法的求助</B></TD>
<TD align=right width=60></TD></TR></TABLE></TD></TR></TABLE>
& l% E4 g* X7 s  {
<>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);
2.  k=2*pi;
1 F+ b- G8 @% `2 @5 a, B3.  xp(1)=x (2);
3 H- u4 a' ?6 y9 ~! }4.  xp(2)=-k*k*x (1);</P>
7 k4 p$ N; E! Y) `, t3 ~<>
1 Q1 Z. N& C3 V+ S* {8 I4 E6 K- k& H&gt;&gt; [t,x]=ode23(harm,0,1,[0 2*pi])
??? Input argument 'x' is undefined.</P>
<>Error in ==&gt; D:\matlabtest\harm.m
% _3 g5 l7 Q8 U  o2 MOn line 3  ==&gt; xp(1)=x(2); </P>
<>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>
& t5 J( c7 T; r<TR>
<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”
( A+ Y- R( F8 b9 c+ c; ?: E<TABLE cellSpacing=0 cellPadding=0 width="100%">

& V' v, Q0 V; q3 F3 Y% H<TR>
<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>
9 F. b# E2 J: r! u* b. b<TD vAlign=bottom align=right width=4></TD></TR></TABLE></TD></TR></TABLE>
( H% u: T) n' I

1. &lt;SCRIPT language=JavaScript&gt;
   , V; @. M; {3 r; K
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'));
   / \1 d# |! A0 J) x* Z
3. &lt;script&gt;

复制代码

6 l5 B2 U  }. d& S. ]; i<!--帖子浏览主体-->
<TABLE  cellSpacing=1 cellPadding=5 align=center>
! p, i2 G" x. H
<TR>
<TD class=tablebody2 vAlign=top width=175>
<TABLE cellSpacing=0 cellPadding=4 width="100%">

; t7 ]; Q0 d) K: a<TR>
<TD  vAlign=center width=*>  <FONT color=#000066><B>21101244</B></FONT> </TD>
<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">
; T, Y2 p7 z& y! F# ^: h6 U
8 g# [8 J) c" {0 G0 K</TD>
<TD class=tablebody2 vAlign=top width=*>
& y/ }) m4 F5 Y2 [1 ?<TABLE width="100%">
# a. S% B. {9 b( G) f
<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>
$ Y, V; W8 K$ o6 v<TR>
' ~/ `8 Q8 r4 ~9 {- R, b. Q<TD colSpan=2 height=1>
<TABLE  cellSpacing=0 cellPadding=0 align=center border=0>
. S7 F4 H; N) j; h7 }
<TR>
" q( B! l$ \9 b( J4 G; k/ p<TD></TD></TR></TABLE></TD></TR></TABLE>
! {/ i* V# z: V9 ]$ D1 X<BLOCKQUOTE>
/ a- ]; N6 l( W& c; P<TABLE  width="90%" border=0>

<TR>
( _. K* n6 y# C1 |- R<TD  width="100%">
+ z2 Z. B$ W+ e3 F<TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>
1 i  f0 R) y9 Z4 Y$ z8 M+ S  h: Z
" s5 M8 W5 u$ h<TR>
( O( a1 u. ]* I4 G<TD width=*>
* q7 i. `3 D7 ~- u<TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>
8 T' N; O, Y* d
<TR>
- A/ n' Y! z, L$ ]  U<TD width=*><IMG src="http://www.madio.net/bbs/Skins/Default/topicface/face1.gif" align=absMiddle border=0> </TD>
<TD align=right width=60></TD></TR></TABLE></TD></TR></TABLE>
& q8 x' o* T2 \
+ N, C9 R# j9 f& r. y- U: I2 _7 C% ^<>[t,x]=ode23('harm',0,1,[0,2*pi])</P>
" [5 A; S. s3 s" U4 x# X- q<>运行后提示必须返回一个列向量</P></TD></TR></TABLE></BLOCKQUOTE></TD></TR></TABLE>