MATLAB: Subscript indices must either be real positive integers or logicals.

subscript indices must either be real positive integers or logicals.

Hi,
I get this error ,
Subscript indices must either be real positive integers or logicals. The line with this error is,
t=linspace(1,10);
F0= 100;
m= 1;
k= 10^2;
w= 11;
wn=sqrt(k./m);
x(t) = (F0/m)*(1/wn^2-w^2)*(sin(t.*w)-sin(t.*wn));
Please help me in resolving this error and what is meant by subscript indices?

Best Answer

I guess the line giving grief is
 x(t) = (F0/m)*(1/wn^2-w^2)*(sin(t.*w)-sin(t.*wn));
x is a vector and t is the subscript of the vector. That is, x(t) is a way to write x_t, the t-th element of x. Subscript should be positive integers.
Taking a look at the vector t should clarify the error.
Also, better look at the documentation of "linspace". Type "help linspace" for that.
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