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# RE: st: twoway line

 From "Lynn Lee" To Subject RE: st: twoway line Date Tue, 4 Sep 2012 20:18:57 +0800

```Thank Maarten and Nick. Your suggestion is really helpful. I appreciate.

Best Regards,
Lynn Lee

-----Original Message-----
From: owner-statalist@hsphsun2.harvard.edu
[mailto:owner-statalist@hsphsun2.harvard.edu] On Behalf Of Nick Cox
Sent: Tuesday, September 04, 2012 6:35 PM
To: statalist@hsphsun2.harvard.edu
Subject: Re: st: twoway line

It could be just that you need to swap -yaxis(1)- and -yaxis(2)-. Note that
-xaxis(1)- is not needed at all.

Sometimes it helps to shift by a constant and then fix the y axis labels.

clear
set obs 20
gen year = _n + 1989
gen y1 = 4 * (rnormal() - 0.5)
gen y2 = 125 + 10 * (rnormal() - 0.5)
gen y3 = y2 - 80
label var y3 "y2"
line y1 y3 year, lcolor(orange blue) yaxis(1 2) ylabel(-10(5)10,
labcolor(orange) axis(1)) ///
ylabel(20 "100" 30 "110" 40 "120" 50 "130" 60 "140", labcolor(blue) axis(2))

Nick

On Tue, Sep 4, 2012 at 11:08 AM, Lynn Lee <lynn09v@gmail.com> wrote:

> I am trying to draw two variables in one graph, with each variable
> having its own scale. For example, value of var1 ranges from 100 to
> 150, value of
> var2 from -10 to 10. So, this graph has two y-axes. My command is
> "twoway line(var1 year,yaxis(1 2) xaxis(1)) (line var2 year),
> ylabel(100(10)150,axis(1) angle(0)) ylabel(-10(5)10,axis(2) angle(0))
> " . I also tried "twoway line(var1 year,yaxis(1 2) xaxis(1)) (line
> var2 year),
> yscale(axis(1) range(100 150)) yscale(axis(2) range(-10 10))
> ylabel(100(10)150,axis(1) angle(0)) ylabel(-10(5)10,axis(2) angle(0))
> ". But the graph shows var1 on the top, var2 at the bottom, since
> Stata takes the
> -10 value as default starting scale for var1, and 150 as default max
> scale for var2. In this case, the time trend of variables are not
> clear. My question is, how to set the scale to let each variable
> having its own stating and max scales, then, the time trend of will be
> shown in the middle of the graph?
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```