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RE: st: R: variable not found?
From
"Kieran McCaul" <[email protected]>
To
<[email protected]>
Subject
RE: st: R: variable not found?
Date
Tue, 25 Oct 2011 07:55:56 +0800
...
yes this is what I suggested originally: type -test 1.group-, that is what is in the model.
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Joerg Luedicke
Sent: Tuesday, 25 October 2011 4:57 AM
To: [email protected]
Subject: Re: st: R: variable not found?
How about this:
test 1.group
J.
On Mon, Oct 24, 2011 at 4:53 PM, Paul Burkander <[email protected]> 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 <[email protected]> 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 <[email protected]> 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
>>> [email protected]
>>>
>>> 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:
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> * http://www.stata.com/support/statalist/faq
> * http://www.ats.ucla.edu/stat/stata/
>
*
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*
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