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| From | Joerg Luedicke <joerg.luedicke@gmail.com> |
| To | statalist@hsphsun2.harvard.edu |
| Subject | Re: st: R: variable not found? |
| Date | Mon, 24 Oct 2011 16:57:05 -0400 |
How about this: test 1.group J. On Mon, Oct 24, 2011 at 4:53 PM, Paul Burkander <paul@burkander.com> wrote: > The use of -test- in this case is not unnecessary, and if it's > incorrect I'd rather you tell me why. Please see > http://www.ats.ucla.edu/stat/stata/dae/mvreg.htm for an explanation of > the usefulness of the joint test across equations. This exercise > follows the example on that page almost exactly. > > Also please note that this question has nothing to do with the > substance of the homework, but with what still appears to be a bug in > stata. I should also note that the homework has been handed in, so no > advice given here will affect it. > > Exactly what I did: using emacs, I replaced the spaces with commas. > then in stata: > > insheet using filename > manova motive aspire algebra geom =group > mvreg > test group > > Which gave the error "group not found." Below is the log. > > What exactly did you type that didn't result in error? > > Thank you. > Paul > > . insheet using data.csv > (5 vars, 221 obs) > > . des > > Contains data > obs: 221 > vars: 5 > size: 4,641 (99.9% of memory free) > --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- > storage display value > variable name type format label variable label > --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- > motiv float %9.0g MOTIV > aspire float %9.0g ASPIRE > algebra float %9.0g ALGEBRA > geom float %9.0g GEOM > group byte %8.0g GROUP > --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- > Sorted by: > Note: dataset has changed since last saved > > . manova motiv aspire algebra geom = group > > Number of obs = 221 > > W = Wilks' lambda L = Lawley-Hotelling trace > P = Pillai's trace R = Roy's largest root > > Source | Statistic df F(df1, df2) = F Prob>F > -----------+-------------------------------------------------- > group | W 0.9056 1 4.0 216.0 5.63 0.0002 e > | P 0.0944 4.0 216.0 5.63 0.0002 e > | L 0.1043 4.0 216.0 5.63 0.0002 e > | R 0.1043 4.0 216.0 5.63 0.0002 e > |-------------------------------------------------- > Residual | 219 > -----------+-------------------------------------------------- > Total | 220 > -------------------------------------------------------------- > e = exact, a = approximate, u = upper bound on F > > . mvreg > > Equation Obs Parms RMSE "R-sq" F P > ---------------------------------------------------------------------- > motiv 221 2 17.81392 0.0384 8.740918 0.0035 > aspire 221 2 14.48455 0.0920 22.19203 0.0000 > algebra 221 2 17.94691 0.0318 7.20056 0.0078 > geom 221 2 14.22695 0.0615 14.34351 0.0002 > > ------------------------------------------------------------------------------ > | Coef. Std. Err. t P>|t| [95% Conf. Interval] > -------------+---------------------------------------------------------------- > motiv | > 1.group | 7.413426 2.507497 2.96 0.003 2.471512 12.35534 > _cons | 42.30231 2.01703 20.97 0.000 38.32703 46.27758 > -------------+---------------------------------------------------------------- > aspire | > 1.group | 9.604709 2.038852 4.71 0.000 5.586426 13.62299 > _cons | 62.79179 1.640052 38.29 0.000 59.55949 66.0241 > -------------+---------------------------------------------------------------- > algebra | > 1.group | 6.778811 2.526216 2.68 0.008 1.800006 11.75762 > _cons | 45.65538 2.032087 22.47 0.000 41.65043 49.66033 > -------------+---------------------------------------------------------------- > geom | > 1.group | 7.584382 2.002592 3.79 0.000 3.637563 11.5312 > _cons | 66.57667 1.610884 41.33 0.000 63.40185 69.75149 > ------------------------------------------------------------------------------ > > . test group > group not found > r(111); > > > On Mon, Oct 24, 2011 at 2:16 PM, Steven Samuels <sjsamuels@gmail.com> wrote: >> >> Sorry, my reply was incomplete. I get no error message with -test- -mvreg- after pasting your data into BBEdit, replacing commas with spaces, and making all names lower case. You haven't actually shown us, as the FAQ request, exactly what you typed. >> >> >> Steve >> >> >> Paul, >> >> >> >> Your use of the -test- statement appears to be incorrect, and unnecessary too. The output of -manova- do give the (four) tests that all groups have zero coefficiernts >> >> You must test four coefficients, not one, if you want a global test of group differences. >> I'd also remind the group that the FAQ suggest we don't respond to requests for help with homework. >> >> >> Steve >> >> >> On Oct 24, 2011, at 4:14 PM, Paul Burkander wrote: >> >> In my attempt at brevity, I didn't note that the variables are turned >> to lowercase when pasted, and we were running the command with the >> correct case. And the error is actually "regressor group not found" >> My apologies for the erroneous description. >> >> This seems like a bug. It's replicated in stata 12. >> >> On Mon, Oct 24, 2011 at 6:01 AM, Nick Cox <n.j.cox@durham.ac.uk> wrote: >>> Whatever the problem is, that will not solve it. >>> >>> -format- changes display format only; it doesn't otherwise change the status of any variable, especially its kind, type or storage characteristics. >>> >>> Nick >>> n.j.cox@durham.ac.uk >>> >>> Christian Otchia >>> >>> You should format the variable after pasting in Stata 11. >>> >>> Try this: >>> >>> format %6.1g GROUP >>> >>> test GROUP >>> >>> >>> Paul Burkander >>> >>>> I'm trying to help my wife do some stata homework, and we've run into >>>> some odd behavior. >>>> >>>> Below is a sample of the data. She's supposed to do a manova of >>>> MOTIV,ASPIRE,ALGEBRA,GEOM, on GROUP , then mvreg, then test the >>>> restriction that the coefficients on GROUP are zero in all four >>>> equations. After doing the manova and mvreg, we typed test GROUP, but >>>> receive the error message "GROUP not found." >>>> >>>> Any ideas? Perhaps we're doing something dumb? She entered the data >>>> by pasting into the data editor. We're using Stata 11 SE and I just >>>> did a full update. >>>> >>>> Thanks, Paul >>>> >>>> MOTIV,ASPIRE,ALGEBRA,GEOM,GROUP >>>> 74.31,78.57,68.59,78.57,1 >>>> 27.15,61.91,37.15,71.43,1 >>>> 64.31,90.48,67.16,83.34,1 >>>> 40.01,64.29,48.59,59.53,1 >>>> 35.73,59.53,31.44,54.76,1 >>>> 55.73,83.34,60.02,85.72,0 >>>> 52.87,64.29,62.88,69.05,0 >>>> 58.59,71.43,64.31,80.95,0 >>> >>> * >>> * 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/ >> > > * > * 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/