See Subject. I don't seem able to produce a simple example of using (Matplotlib) histogram that uses range. I tried a variety of ranges, range=(5,22), range=(0, 50.2), ... and I see no difference between any of the x values scale on the plot. Can someone provide an example that shows how it works? -- Wayne Watson (Watson Adventures, Prop., Nevada City, CA) (121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time) Obz Site: 39° 15' 7" N, 121° 2' 32" W, 2700 feet 350 350 350 350 350 350 350 350 350 350 Make the number famous. See 350.org The major event has passed, but keep the number alive. Web Page: <www.speckledwithstars.net/>