问题描述：
matlab出现? Subscript indices must either be real positive integers or logicals.
t=-10:0.01:10;
k=-2;
x(t)=exp(k*t-1);
t1=-t-2;
t2=t/5+2;
t3=3t+2;
x(t1)=exp(k*t1-1);
x(t2)=exp(k*t2-1);
x(t3)=5*exp(k*t3-1)
t=-10:0.01:10;
k=-2;
x(t)=exp(k*t-1);
t1=-t-2;
t2=t/5+2;
t3=3t+2;
x(t1)=exp(k*t1-1);
x(t2)=exp(k*t2-1);
x(t3)=5*exp(k*t3-1)
问题解答：
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