Sara,
I like to use TimeSeries because you can shift and scale things later (if you need to compare real data, etc.).
Using the example from NDSolve:
s = NDSolve[{y'[x] == y[x] Cos[x + y[x]], y[0] == 1}, y, {x, 0, 30}][[1]]
The answer is in seconds so I construct a TimeSeries from it that has minute spacing:
ListLinePlot[TimeSeries[(y /. s)[Range[0, 30, .1]], {0, 30/60}],
PlotRange -> All]
to get:
