Histogram - adjusting the start of the x axis

[Ian Gonzales]

Hello everyone! I am creating an epidemic curve using the histogram function. I have successfully created a graph, however there is a space (gap) between the 1st bin (dated 26sep2021) and the y axis. I'd like the 1st bin to start at 0 (no gap). I tried using the xscale(range option but it does not seem to work. I am using Stata version 14.2 on Windows 10. Any insights? Thank you!

histogram date_onset, bin(17) frequency fcolor(dknavy) lcolor(dknavy) lpattern(blank) ytitle(No. of Cases) ytitle(, orientation(horizontal)) ylabel(, angle(horizontal) nogrid) xtitle(Date of Onset) xlabel(#17, format(%tdDD)) graphregion(margin(large) fcolor(white))

For additional information, the earliest Date of Onset is 26sep2021 and last date is 15nov2021. I just used the DD for the x-axis tick labels because I will be adding a text box under the dates to indicate the month (and move the Date of Onset x axis label lower).

* Example generated by -dataex-. To install: ssc install dataex
clear
input byte age str6 sex float date_onset
49 "male"   22549
71 "male"   22551
15 "female" 22552
58 "female" 22552
22 "male"   22552
22 "male"   22552
 1 "male"   22552
30 "female" 22552
25 "male"   22552
 5 "male"   22553
12 "female" 22553
33 "male"   22554
28 "male"   22554
82 "female" 22554
20 "male"   22554
10 "male"   22554
21 "female" 22554
21 "female" 22554
12 "female" 22554
23 "female" 22554
end
format %td date_onset

[Nick Cox]

Use an extra option

plotregion(margin(zero))

[Ian Gonzales]

Use an extra option

plotregion(margin(zero))

Thank you, Nick! That managed to narrow the gap. I played around with the margin some more and figured out the custom margin. If set to (-5 0 0 0), the gap will close, albeit with a small overlap of the 1st bin to the y-axis. All the best!

histogram date_onset, bin(17) frequency fcolor(dknavy) lcolor(dknavy) ///
lpattern(blank) ytitle(No. of Cases) ytitle(, orientation(horizontal)) ///
ylabel(, angle(horizontal) nogrid) xtitle(Date of Onset) ///
xlabel(#17, format(%tdDD)) graphregion(margin(large) fcolor(white)) ///
plotregion(margin(-5 0 0 0))