Re: st: RE: Help with Graphs

[Cameron Hooper <chooper@umich.edu>]

Thanks Scott. I've run your code and the graph is starting to take 
shape. I will read the sections of [G] you recommend. Looking at the 
graph so far my main issues will be:

1. How to make the line style for the "regime switching" regression the 
same. At the moment it is solid in the positive sloping region and 
dashed in the negative.

2. At the moment the graph produces 4 legend entries. I will want to 
reduce these to just two. I expect the only tricky one will be 
preventing the RW regression showing up twice as it does now.

But I should do some reading first myself :-) Thanks again.

Cameron

Scott Merryman wrote:

> 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
>
> For more info see 
> [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: owner-statalist@hsphsun2.harvard.edu [mailto:owner-
> > statalist@hsphsun2.harvard.edu] On Behalf Of Cameron Hooper
> > Sent: Tuesday, December 21, 2004 8:31 PM
> > To: statalist@hsphsun2.harvard.edu
> > 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
>
>
>
> *
> *   For searches and help try:
> *   http://www.stata.com/support/faqs/res/findit.html
> *   http://www.stata.com/support/statalist/faq
> *   http://www.ats.ucla.edu/stat/stata/
--
Cameron Hooper <chooper@umich.edu>
University of Michigan Business School
701 Tappan St., Ann Arbor, MI 48109
phone: 734-615-4178  fax: 734-936-0282
Public Key: 
http://wwwkeys.pgp.net:11371/pks/lookup?op=index&search=0xFCCF8C91
*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/