查看: 3546|回复: 0

ode32用法的求助

字体大小: 正常放大

21101244

2 主题	0 听众	22 积分

升级 17.89%

该用户从未签到

电梯直达

1^#

发表于 2005-4-12 15:41 |只看该作者 |倒序浏览

|招呼Ta 关注Ta

<TABLE  cellSpacing=1 cellPadding=5 align=center>

<TR>
<TD class=tablebody1 vAlign=top width=*>
<BLOCKQUOTE>
<TABLE  width="90%" border=0>

<TR>
<TD  width="100%">
<TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>

<TR>
<TD width=*>
<TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>

<TR>
<TD width=*><B>于ode32用法的求助</B></TD>
<TD align=right width=60></TD></TR></TABLE></TD></TR></TABLE>

<

>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;
3.  xp(1)=x (2);
4.  xp(2)=-k*k*x (1);</P>
<

>
>> [t,x]=ode23(harm,0,1,[0 2*pi])
??? Input argument 'x' is undefined.</P>
<

>Error in ==> D:\matlabtest\harm.m
On line 3 ==> 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>
<TR>
<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>
<TD class=tablebody1 vAlign=center width=*>欢迎大家作客“矩阵工作室”
<TABLE cellSpacing=0 cellPadding=0 width="100%">

<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&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>
<TD vAlign=bottom align=right width=4></TD></TR></TABLE></TD></TR></TABLE>

<SCRIPT language=JavaScript>
0 E% m0 w2 O+ p+ M8 S\" y
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 S0 z2 f! W9 G% | _4 @
<script>

复制代码

<TABLE  cellSpacing=1 cellPadding=5 align=center>

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

<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">

</TD>
<TD class=tablebody2 vAlign=top width=*>
<TABLE width="100%">

<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&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>
<TD width=80>第 <FONT color=#ff0000>2</FONT> 楼 </TD></TR>
<TR>
<TD colSpan=2 height=1>
<TABLE  cellSpacing=0 cellPadding=0 align=center border=0>

<TR>
<TD></TD></TR></TABLE></TD></TR></TABLE>
<BLOCKQUOTE>
<TABLE  width="90%" border=0>

<TR>
<TD  width="100%">
<TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>

<TR>
<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>
<TD align=right width=60></TD></TR></TABLE></TD></TR></TABLE>

<

>[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>

zan