'Error - Array indices must be positive integers or logical values

2020 8 9
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Walter Roberson
Walter Roberson 2020-8-9

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t1 = 0;
t2 = 0.04;
So t2-t1 is 0.04 - 0 = 0.04
x_2 = v_x1(t2-t1)+x_1
That code attempts to index v_x1 at location t2-t1 which is v_x1 at index 0.04 which is not valid.
Reminder: MATLAB has absolutely no implied multiplication. None . Not even in the Symbolic Engine. If you want to multiply v_x1 by something then you need .* or * as appropriate.

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