Index exceeds the number of array elements (1).

1 次查看(过去 30 天)
clc;clear;
tf=10;
n=1;
t(n)=0.1;
dt=0.1;
G1(n)=1; G2(n)=0; G3(n)=-1; G4(n)=0;
m(n,:)=[1 0 -1 0];
while t(n)<=tf
m(n+1,:)=m(n,:)+slope(t(n),m(n,:))*dt;
n=n+1;
end
It shows me like Index exceeds the number of array elements (1)
Error in cars (line 8)
while t(n)<=tf
and this is my fucntion.
function [out] = slope(t,G)
k1=10;k2=20;m1=2;m2=4;
v1=G(1); x1=G(2);v2=G(3);x2=G(4);
out(1)=(-k1*x1+k2*(x2-x1))/m1;
out(2)=v1;
out(3)=-k2*(x2-x1)/m2;
out(4)=v2;
end
why? how I can fix it?
Thank you

回答(1 个)

Walter Roberson
Walter Roberson 2019-7-16
You only assign to t(n) when n is 1, so t(1) exists but no other t location. You then increase n to 2 and expect t(2) to exist.

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