not enough input arguments??

function dxdt = msd_ode(time,state, k, c)
x = state(1);<----- error
vx = state(2);
dxdt(1) = vx;
dxdt(2) = -k*x-c*vx;
dxdt = dxdt(:);

i have this error on line 2

how to solve it?? help

[Azzi Abdelmalek]

How did you call this function?

And what this line is doing?

dxdt = dxdt(:);

[Jan]

@Azzi: dxdt = dxdt(:) reshapes dxdt to a column vector.

@Jeason: Please post the complete error message. Currentlöy we can only guess, if the title is a question, a part of the error message or an assumption.

[Walter Roberson]

We need to see your call to the ode routine.