"Error using input The first argument to INPUT must be a character vector."

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muhammad farttoos 2019-9-22

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/481526-error-using-input-the-first-argument-to-input-must-be-a-character-vector

评论： Walter Roberson 2019-9-22

I keep getting error from Matlab when used this code and it refere that the error in "i = input(t);", I attached my code, can anyoone helping me

start_time = 0;
end_time = 10;
dt = 0.005;
times = start_time:dt:end_time;
N = numel(times);
x = [0; 0; 10];
xdot = zeros(3, 1);
theta = zeros(3, 1);
deviation = 100;
thetadot = deg2rad(2 * deviation * rand(3, 1) - deviation);
for t = times
i = input(t);
omega = thetadot2omega(thetadot, theta);
a = acceleration(i, theta, xdot, m, g, k, kd);
omegadot = angular_acceleration(i, omega, I, L, b, k);
omega = omega + dt * omegadot;
thetadot = omega2thetadot(omega, theta);
theta = theta + dt * thetadot;
xdot = xdot + dt * a;
x = x + dt * xdot;
end

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Stephen23 2019-9-22

"can you please check i = input(t); "

There is no point in checking that: as its documentation clearly states, input's first argument must a character vector. The variable t is not a character vector.