solving second ode from ASCII file data

Hi all,

I need to solve ode such as: ydotdot = c1 * ydot - c2 y + z

c1 and c2 are constants,and z is the acceleration. Solving that for a constant z is simple however I get the values of z from an experiment. after the experimet there's a file with two columns for time and acceleration. I don't know how to enter the values of the time and acceleration into the equation even when I manually put the time and the acceleration as two seperate vectors into the workspace.

Does anyone have an idea how to do that?