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From |
"Lachenbruch, Peter" <[email protected]> |

To |
"'[email protected]'" <[email protected]> |

Subject |
st: RE: Re: Putting variable ylines in a graph |

Date |
Thu, 21 Jan 2010 14:28:01 -0800 |

Thanks, Nick. I got everything but the equals in one try or another... Tony Peter A. Lachenbruch Department of Public Health Oregon State University Corvallis, OR 97330 Phone: 541-737-3832 FAX: 541-737-4001 -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Nick Cox Sent: Thursday, January 21, 2010 11:54 AM To: [email protected] Subject: st: Re: Putting variable ylines in a graph -yline()- is strict: it needs a numlist. However, you can do calculations on the fly using a standard construct. rvfplot, yli(`=-2*e(rmse)' `=2*e(rmse)') The `=exp' syntax is explained at -help macro-. If you type `=2 * e(rmse)', for example, Stata reads this as 1. Do the calculation 2 * e(rmse) 2. Insert the result at this place so that the command being typed can see it. Thus -yline()- is pretty dumb and certainly contains no hidden calculator, but the rest of Stata is up to doing what you want. As usual, start with a left quote ` and finish with a right quote '. Nick [email protected] From: Lachenbruch, Peter [mailto:[email protected]] I am using rvfplot to graph residuals and I would like to draw lines at -2 sd and 2 sd limits. My thought was to use rvfplot, yline(-2*e(rmse) 2*e(rmse)) But Stata did not like it: . rvfplot,yline(2*e(rmse) 2*e(rmse)) invalid line argument, -2*(e(rmse) 2*e(rmse) r(198); I tried setting the limits to a scalar or a local scalar, but I got the same result (I had set scalar L= 2*e(rmse) ) .rvfplot,yline(-L L) invalid line argument, -L L r(198) Is there a way to do this or does yline require numbers rather than functions? I could do several twoway plots (one for residuals,one for the upper limit, one for the lower limit), but this seems a bit cumbersome * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/ * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**References**:**st: Re: Putting variable ylines in a graph***From:*"Nick Cox" <[email protected]>

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