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<TD width=*><B>于ode32用法的求助</B></TD>! t/ }. F0 t$ t$ y
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<>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>. X3 e( D: P5 h1 k& ?& J! E5 @0 ~
<>1. function xp=harm(t,x); ' N% h( [' o6 z8 r; M) ^2. k=2*pi;8 a2 V7 G. ~9 r
3. xp(1)=x (2); 5 l) s! i. y& W, d; N( A( d7 W4. xp(2)=-k*k*x (1);</P>% o5 o: t" D6 D' `8 ~4 x8 [, j; h, F
<> + }% U2 y$ L! _2 U>> [t,x]=ode23(harm,0,1,[0 2*pi]) j! X! d) s% x+ O+ f) `$ W" _3 p??? Input argument 'x' is undefined.</P> 4 ]4 {. n6 B( ^% u4 n* Z, @<>Error in ==> D:\matlabtest\harm.m 7 Z2 @ c" c9 m* w- X4 D& R5 C8 gOn line 3 ==> xp(1)=x(2); </P>! G( U- W+ J" r
<>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>+ C R6 Q. h2 H
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<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> ! u. u; E1 K+ l) X! C; x# f+ k; Q<TD class=tablebody1 vAlign=center width=*>欢迎大家作客“矩阵工作室” 7 E3 g& U$ o0 H3 P
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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>. X3 e( D: P5 h1 k& ?& J! E5 @0 ~
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