How to modify the width of x- and y-axis are the same?

[Linh Nguyen]

Hi everyone,

In my example, delta1 = 0.05 (y-axis) has the width is larger than delta 2 = 0.2 (x-axis). Now, I want the width of delta 1 and delta 2 are the same.

Any help is greatly appreciated.

* Example generated by -dataex-. To install: ssc install dataex
clear
input float(month mean_lnpr change_spr)
456             .           .
457   -.012707757  .019999966
458    .010914537   -.0599999
459   -.031224454 -.030000135
460   -.016030535 -.019999966
461   -.019678574  .019999966
462    -.04870307 -.009999797
463    -.10341889    .0599999
464     .05016299   .24999976
465   -.021242706 3.72529e-07
466    .003762972           .
467    -.00563306  -.09000003
468   -.021960266         .11
469    -.03802032  -.03999993
470   -.023665084   -.0400003
471    .067306496  .019999966
472      .0206784   -.0599999
473   .0004590258   -.2700001
474    -.02653531  -.01000017
475    -.03900745   -.1899995
476     -.0344338    .1000002
477   -.033056814  -.14999993
478   -.018032696   .20999946
479   -.003666928 -.009999797
480     -.0106339  -.07000007
481    -.01839246         .11
482    .004777093  .009999424
483       .030778   .04000068
484 -5.291117e-06  -.21000057
485    .008179313   .29000044
486     .04986938   .05999953
487    -.03466524   .09000003
488    .007029713   .07000044
489    -.02866596   .03999993
490   -.013984645   .02999976
491    .034782033           .
end
format %tmMonth_CCYY month

twoway (scatter mean_lnpr change_spr,msymbol(S) msize(small)) ///
(lfit mean_lnpr change_spr,lpattern(shortdash_dot)) ///
(qfit mean_lnpr change_spr,lpattern(dash)), ///
ytitle(Monthly Equity Returns ) xtitle(Monthly Changes in the Default Spread) graphregion(color(white)) ///
legend(label(2 "Linear Prediction Line") label(3 "Quadratic Prediction Line") order(2 3))

[Nick Cox]

You can control

xscale()

yscale()

xsize()

ysize() 

aspect()