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<TD width=*><B>于ode32用法的求助</B></TD>3 c# ~, g% m7 N& M. w9 [4 ]
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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>4 ?3 J7 S3 X8 B3 Q5 \) ~5 \" n
<>1. function xp=harm(t,x);
k) Y! ]5 C; Q: n" A) b7 h( k2. k=2*pi;
+ t7 g$ t, x/ X$ D1 i8 r3. xp(1)=x (2);; t; V4 L5 m2 U+ N. \) B
4. xp(2)=-k*k*x (1);</P>
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- k7 |0 G( U. |7 I+ T>> [t,x]=ode23(harm,0,1,[0 2*pi])
6 S$ s' ?+ H) B# A3 N??? Input argument 'x' is undefined.</P>* X4 q0 P% V* z8 p
<>Error in ==> D:\matlabtest\harm.m
4 M3 F$ [2 s$ [# J# bOn line 3 ==> xp(1)=x(2); </P>
~) y( R7 L1 ~- D6 }; w' [) [; g<>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>: \* M' e) e# C: b
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; G2 I6 B1 t5 `* _* o, q) Q<TD class=tablebody1 vAlign=center width=*>欢迎大家作客“矩阵工作室” ( k0 Q7 I6 ~- Y1 b) A0 m) X
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<>[t,x]=ode23('harm',0,1,[0,2*pi])</P>$ [' Y5 Y! m; t, a$ T L
<>运行后提示必须返回一个列向量</P></TD></TR></TABLE></BLOCKQUOTE></TD></TR></TABLE> |
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发表于 2005-4-12 15:41
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