usage of fix move/mesh with linear/variable style

Submitted by c00l on Wed, 07/03/2013 - 10:50

I want to use the fix move/mesh with the linear/variable style but I don’t know in which way I have dot define the variables for the velocity. Is it an array that has the same number of elements as time steps? Or is it a scalar and I have to change its value every time step. Can you give an short example please.
And a further issue, is it possible to import data form a file, so that I can impose measured motions.