How to remove the left blank margin in a plot

[Puhong Yu]

I want to make a simple plot representing a consumer's consumer surplus in Stata. By default, Stata leaves some blank margin in the left, but this makes the graph quite strange (the triangle is not closed).I searched Statalist and tried many ways to remove it, including using xscale and plotregion(margin(zero)), but none of them worked. Could anyone tell me how to achieve this (removing the blank between AB and the y axis in the attached graph)? Many thanks in advance.

The code I wrote is as follows:
clear

set obs 100
generate q=_n-1
generate p=50
generate cons=100-q
twoway (line cons q) (line p q, lpattern(dash)), xline(25, lpattern(dash)) xtitle("Consumption") ytitle("Price") text(51 51 "O", place(nw)) text(50 1 "A", place(s)) text(100 1 "B", place(n)) xlabel(25 "Garbage") ylabel(50 "p" 100 "a") title("Free Disposal of Garbage") xscale(range(0 105)) legend(off) graphregion(margin(zero))

[Puhong Yu]

Thank you very much. It works perfectly. Scott Merryman

[Andrew Musau]

Good find Scott Merryman!

[Scott Merryman]

Adding -plotregion(margin(zero)) seems to work:

clear
set obs 100
generate q=_n-1
generate p=50
generate cons=100-q
twoway (line cons q) /// 
    (line p q, lpattern(dash)), xline(25, lpattern(dash)) ///
     xtitle("Consumption") ytitle("Price") text(51 51 "O", place(nw)) ///
     text(50 1 "A", place(s)) text(100 1 "B", place(n)) /// 
     xlabel(25 "Garbage") ylabel(50 "p" 100 "a") /// 
     title("Free Disposal of Garbage")  /// 
     legend(off) xscale(range(0 105)) graphregion(margin(zero)) /// 
     scheme(s2mono)   plotregion(margin(zero))

[Andrew Musau]

Short answer, you cannot. You have to suppress the axes and mimic them using lines. This has not been tidied up.

set obs 100
generate q=_n-1
generate p=50
generate cons=100-q

twoway (line cons q) (line p q, lpattern(dash)) (scatteri 105 -0.5 "-" 105 -2 "a" ///
55 -0.5 "-" 55 -2 "p" 3 25 "I" -0.5 25 "Garbage", mlabpos(6) msymbol(none) ///
mlabsize(*1.25) mlabcolor(black)), xline(0, lc(black) lw(thin)) xscale(off) yline(0, lc(black) ///
lw(thin)) yscale(off) xline(25, lpattern(dash)) xtitle("Consumption") ytitle("Price")  ///
text(51 51 "O", place(nw)) text(50 1 "A", place(s)) text(100 1 "B", place(n)) xlabel(25 "Garbage") ///
ylabel(50 "p" 100 "a") title("Free Disposal of Garbage")  legend(on order(0) nobox ///
region(lstyle(none))) graphregion(margin(zero))