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From |
Jeph Herrin <stata@spandrel.net> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: Question about scalars |

Date |
Mon, 09 Aug 2010 15:26:44 -0400 |

Yes, but look closely at > . scalar e = d + a > . scalar dir a d e // "e" is wrong > a = 10 > d = 4.9458042 > e = 131 You'll see that 4.94+10 = 131. Which is incorrect. cheers, Jeph On 8/9/2010 2:15 PM, Sergiy Radyakin wrote:

Hi, Steve, there might be something else in your program that prevents it from running. Both code fragments that you compare work fine in my Stata 9 and Stata 11. Best, Sergiy . do "R:\TEMP\STD0h000000.tmp" . clear . scalar drop _all . scalar a = 10 . scalar b = 20 . scalar c = b + a . scalar dir c = 30 b = 20 a = 10 . . sysuse auto, clear (1978 Automobile Data) . reg mpg foreign Source | SS df MS Number of obs = 74 -------------+------------------------------ F( 1, 72) = 13.18 Model | 378.153515 1 378.153515 Prob> F = 0.0005 Residual | 2065.30594 72 28.6848048 R-squared = 0.1548 -------------+------------------------------ Adj R-squared = 0.1430 Total | 2443.45946 73 33.4720474 Root MSE = 5.3558 ------------------------------------------------------------------------------ mpg | Coef. Std. Err. t P>|t| [95% Conf. Interval] -------------+---------------------------------------------------------------- foreign | 4.945804 1.362162 3.63 0.001 2.230384 7.661225 _cons | 19.82692 .7427186 26.70 0.000 18.34634 21.30751 ------------------------------------------------------------------------------ . scalar d = _b[foreign] . scalar e = d + a . scalar dir a d e // "e" is wrong a = 10 d = 4.9458042 e = 131 . . tempname dd . scalar `dd' = _b[foreign] . scalar e = `dd' +a . scalar dir a `dd' e // "e" is /okay a = 10 __000000 = 4.9458042 e = 14.945804 . end of do-file On Mon, Aug 9, 2010 at 1:57 PM, Steve Samuels<sjsamuels@gmail.com> wrote:In the code below, I generate a scalar "d" from a regression result; it looks okay, but trying to add it to another scalar doesn't work. If, however I use a -tempname- , I get the right answer. Could someone explain to me why the first approach doesn't work and if there's another approach that doesn't involve a -tempname-? Thanks, Steve ****************************** clear scalar drop _all scalar a = 10 scalar b = 20 scalar c = b + a scalar dir sysuse auto, clear reg mpg foreign scalar d = _b[foreign] scalar e = d + a scalar dir a d e // "e" is wrong tempname dd scalar `dd' = _b[foreign] scalar e = `dd' +a scalar dir a `dd' e // "e" is /okay **************************** -- Steven Samuels sjsamuels@gmail.com 18 Cantine's Island Saugerties NY 12477 USA Voice: 845-246-0774 Fax: 206-202-4783 * * 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/

* * 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/

**Follow-Ups**:**Re: st: Question about scalars***From:*Sergiy Radyakin <serjradyakin@gmail.com>

**Re: st: Question about scalars***From:*Austin Nichols <austinnichols@gmail.com>

**References**:**st: Question about scalars***From:*Steve Samuels <sjsamuels@gmail.com>

**Re: st: Question about scalars***From:*Sergiy Radyakin <serjradyakin@gmail.com>

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