Help histogram and range

[salvomic]

H Width: 500
H Rng: 1000 to 3500 (since your data values are in between 1000 and 3500)
X Rng: 500 to 4000 (viewing window; should generally be slightly bigger than H Rng)
Y Rng: -1 to 40 (-1 to see the horizontal axis, and 40 since 1+3+4+12 < 40)
X Tick: 500
Y Tick: 5
[/quote]

thank you Han!
my error was to give at H Rng the frequency and not the values...

Also with your settings all goes well.

Salvo