Reducing space between x-axis and bar

[Hyun Woo Kim]

Hi all,

webuse auto, clear
hist mpg, freq

gives me a nice histogram and there is no gap between x-axis line and bar, like below.

But,

twoway histogram mpg, freq

gives me the same histogram but some "gap" between x-axis line and bar...

Is there any way to control this gap with "graph" or "twoway" command, not "histogram"?

Thanks in advance.

[Nick Cox]

. sysuse auto, clear
(1978 Automobile Data)

. twoway histogram mpg, freq plotregion(margin(b=0))