How I can draw the grid lines at intervals with step=1?

[Chris Rebert]

On Mon, Apr 2, 2012 at 5:14 PM, Andres Soto <soto_andres at yahoo.com> wrote:
> Hi
> I am trying to draw a step (or staircase) function. My points are all
> integers. I would like that the grid lines help to identify the limits of
> each line, but when I draw the grid, it is set each 5 units.
> How can I draw the grid lines at intervals with step=1?

What drawing/plotting/charting library are you using?

Cheers,
Chris