# st: RE: Help with Graphs

 From "Scott Merryman" <[email protected]> To <[email protected]> Subject st: RE: Help with Graphs Date Tue, 21 Dec 2004 22:10:43 -0600

```The basic graph can be made up two commands: -twoway function- and -twoway
scatter-

twoway function y = 0.35299 + 0.692*x, range(0 .461) || ///
function y = 0.96888 - 0.644*x, range(.461 1) || ///
function y = 0.316 + 1.248*x - 1.301*x^2 , range(0 1) ///
|| scatter q erc

[G] graph twoway function
[G] graph twoway qfit
[G] graph twoway lfit
[G] graph twoway scatter

I would also recommend "A Visual Guide to Stata Graphics"
(http://www.stata-press.com/books/vgsg.html)

The graph could refined by changing the line color, marker style, the
legend, ....

Hope this helps,
Scott

> -----Original Message-----
> From: [email protected] [mailto:owner-
> [email protected]] On Behalf Of Cameron Hooper
> Sent: Tuesday, December 21, 2004 8:31 PM
> To: [email protected]
> Subject: st: Help with Graphs
>
> Hi
>
> I am new to Stata and am looking for some help with graphs. I've looked
> at the Users/Getting Started Guides and I'm okay with the basics.
> However, I'm having trouble making the step to more advanced graphs. I
> have access to the Graphics Manual, but it's more of a reference than an
> guide. I'll get it with time, but I'm hoping to get up to speed with
> graphs reasonably quickly.
>
> Would anyone be willing to show me how to use STATA to create the graph
> at the link given below? I realize this might be an unreasonable
> request. If so, no worries, just ignore me. But if anyone could help me
> out, I'd be grateful. The graph is reasonably complex so examining the
> code needed to produce it will teach me a lot in a short period of time.
>
> The example graph is available at:
>
> http://www-personal.umich.edu/~chooper/stata/portfolio_plot.pdf
>
> The data used to generate the plot is available at:
>
> http://www-personal.umich.edu/~chooper/stata/testdata.dta
>
> The x-axis variable is "erc", the y-axis variable is "q"
>
> The line labeled Quadratic regression is the function:
>
> f(x) = 0.316 + 1.248*x - 1.301*x**2 (0 <= x <= 1)
>
> The line labeled Regime Switching regression is the function:
>
>           |  0.35299 + 0.692*x if 0 <= x <= 0.461
>    g(x) = |
>           |  0.96888 - 0.644*x if 0.461 < x <= 1
>
> Despite the appearance of the pdf I want the plot to be in black and
> white. If it matters, I will be saving the graph as a png file for
> importing into a LaTeX document. (I use pdflatex so eps files won't work
> without conversion.)
>
> If you read this far then thanks! I hope you can help me out.
>
> Cameron

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```