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<TD width=*><B>于ode32用法的求助</B></TD>
: q& q' h% Z, I/ T$ m0 h<TD align=right width=60></TD></TR></TABLE></TD></TR></TABLE>
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" \4 e4 P5 s9 g% j: E/ C< >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>
- u( ~% O3 Y; | h3 P4 O) ]<>1. function xp=harm(t,x);! r- I. [9 f* z `8 ]6 u6 G- {2 F7 e
2. k=2*pi;
# m5 ?, a6 ~: O4 q7 O3. xp(1)=x (2);
/ |) r% U. d! C( j/ H7 N4. xp(2)=-k*k*x (1);</P>8 s2 j4 x& u$ d: _6 J; W
<>; Y1 U$ l- j. {, X6 Q
>> [t,x]=ode23(harm,0,1,[0 2*pi])! c, A$ G2 U# m, g: A
??? Input argument 'x' is undefined.</P>
5 u0 k% Q- O+ `0 U {6 b6 K4 r1 P$ c<>Error in ==> D:\matlabtest\harm.m& O' W" D, u7 q$ ~
On line 3 ==> xp(1)=x(2); </P>
% T/ J6 a+ g* ^5 N3 E<>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>
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1 R+ `3 `4 o+ I2 P- j<TD class=tablebody1 vAlign=center width=*>欢迎大家作客“矩阵工作室” : ^+ ^6 ^1 G) P+ i+ N) v
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2 i5 X% m% Z6 |6 M<>[t,x]=ode23('harm',0,1,[0,2*pi])</P>
O, @; p2 n w$ J: m3 d! U" m( z<>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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