variable loop

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1

Dear Lammps users,

I am testing some lattice system under displacement-control loading. The
steps are as follows:

Step 1. Run NVE assemble of the lattice for 1000 steps while holding the
displacements on the boundary to be 1.0.
Step 2. Increase the boundary displacements to be 2.0; Run NVE assemble
for another 1000 steps, where the initial configurations (i.e. partial
coordinates and velocities) are chosen to be the results from the last
integration in Step 1.
Step 3. Increase the boundary displacements to be 3.0; Run NVE assemble
for another 1000 steps, where the initial configurations (i.e. partial
coordinates and velocities) are chosen to be the results from the last
integration in Step 2.

Below is a part of my input script on applying 'variable loop' to run this
simulation.

2

You need the 'jump'. The command 'variable n loop 3' only define a variable that will have the values 1, 2 and 3 in this specific sequence.

Like this: