4
MATLAB
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2. - (function m-files) , , . - . - :
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function[y1,y2,,yn]=_( )
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y1 =
y2 =
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yn =
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[y1,y2,,yn]=_( )
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M- ( 
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):
| function consol dl=input(' dl='); N=input(' N='); x0=input(' x0='); y0=input(' y0='); z0=input(' z0='); dl,N,x0,y0,z0 h=dl/N G=3;S=12; c=0.02*(G+S); disp(' x y z'); d=zeros(N+1,3); d1=zeros(N+1,1); d2=zeros(N+1,1); d3=zeros(N+1,1); for i=1:N+1 d1(i)=x0; d2(i)=y0; d3(i)=z0; z=z0+h*f(x0,z0,c); y=y0+h*(z0+z)/2; x0=x0+h; z0=z; y0=y; end d=[d1 d2 d3]; disp(d); function y=f(x,z,c) y=c*M(x,c)*sqrt((1+z^2)^3); function u=M(x,c) u=1/sqrt((1+(c*x)^2)^3); |
:
dl 1
N 10
x0 0
y0 0
z0 0
dl =
N =
|
|
|
x0 =
y0 =
z0 =
h =
0.1000
x y z
0 0 0
0.1000 0.0015 0.0300
0.2000 0.0060 0.0600
0.3000 0.0135 0.0900
0.4000 0.0240 0.1200
0.5000 0.0375 0.1500
0.6000 0.0540 0.1800
0.7000 0.0735 0.2100
0.8000 0.0960 0.2400
0.9000 0.1215 0.2700
1.0000 0.1500 0.3000
