" j% ]7 R: b7 R$ @<TR> ; @& x( p* l& A' S4 O<TD class=tablebody1 vAlign=top width=*> # ~7 @; [/ }* b; J4 S) u' r" Z0 D) D S<BLOCKQUOTE> 4 h: d% ?! n- q' w% Y- g" D( L- }* v3 f* A<TABLE width="90%" border=0>, |. r4 f5 x$ p# i _
T' R$ }9 @6 ], W6 ^- g1 g
<TR>1 G0 b/ }) L! g
<TD width="100%"> ' n! g! V# v g<TABLE cellSpacing=0 cellPadding=0 width="100%" border=0> 8 i/ T3 Q2 M" \3 ^1 h7 }9 e7 M7 b$ Z2 D
<TR>& o' f3 W5 T" V1 ?1 g8 z3 a
<TD width=*> 9 k1 a5 J+ G, F4 |1 U<TABLE cellSpacing=0 cellPadding=0 width="100%" border=0># c+ T. Z l8 Z# C0 ]% I
8 B' n" a# k& a6 f& }, z9 ]1 X<TR> ( O7 k. Z+ s3 P' }0 a W- f( I s( Y+ L<TD width=*><B>于ode32用法的求助</B></TD>5 Q* c! b' |, l
<TD align=right width=60></TD></TR></TABLE></TD></TR></TABLE> * J- j! ?4 i5 T7 ^1 [ ! I' |! l. }/ p9 }<>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>9 ?) C) ^( b1 h" L% p& I# @ B
<>1. function xp=harm(t,x);" |/ G+ r; ^, |0 l) s) ?4 ^
2. k=2*pi;$ c: B! q/ S9 b$ m1 k
3. xp(1)=x (2);/ Y2 _/ u% U D* _" Z8 {
4. xp(2)=-k*k*x (1);</P> + @$ h& W5 C. b- y% C<>, j2 i" }% Y: z; w# ^9 s
>> [t,x]=ode23(harm,0,1,[0 2*pi])' }1 D! L9 N+ k, Z& }( `
??? Input argument 'x' is undefined.</P>. \# {$ C0 S% n
<>Error in ==> D:\matlabtest\harm.m ; o% G. f/ l8 Q) WOn line 3 ==> xp(1)=x(2); </P> 7 B+ t! g) a) J! 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> 4 G' r* J7 H# x<TR>" p) H( X# n N: w8 ?- \" w0 x/ W
<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>2 ^9 q9 H, n& W& A$ V- c" h
<TD class=tablebody1 vAlign=center width=*>欢迎大家作客“矩阵工作室” 9 R/ W) }8 c# M1 \+ L& N; @9 l<TABLE cellSpacing=0 cellPadding=0 width="100%"> ( a6 E }" y- F [ * G0 ~/ ^, X2 J) j" v7 i) L! _1 a5 R<TR> 6 l: c0 ?/ D5 F! R/ p+ S<TD vAlign=center align=left> </TD> 3 d, v$ e7 y3 I<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>: m. f0 Y& C7 }6 o# b+ Y8 C
<TD vAlign=bottom align=right width=4></TD></TR></TABLE></TD></TR></TABLE> : j1 {+ h- p5 m" u% i. W- d* i
<SCRIPT language=JavaScript> 9 n' Z0 E$ G0 [- i% G& v8 L
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 s1 V% w1 o+ x
<script>
复制代码
' s: G) ]0 ], J
<!--帖子浏览主体-->8 S8 ~* p# A n& v% N/ z
<TABLE cellSpacing=1 cellPadding=5 align=center>: s2 @' ~5 a4 P. D% M
IP卡
狗仔卡
发表于 2005-4-12 15:41
>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>9 ?) C) ^( b1 h" L% p& I# @ B
转播
淘帖
分享
收藏
支持
反对
微信
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
抢沙发
显身卡
