If you followed this route, you would
also need to have -univar- installed.
I suspect -estout- after -regress-
can give you a competitive solution, but
I have never used it, so can't advise in
detail.
Nick
[email protected]
Herve STOLOWY
> Sorry, I did not see your first posting. I just discovered
> Nick's reply. Some time ago, I raised the same issue and
> received several replies which helped to find a solution. But
> this solution, as Nick said, is not a "short answer".
>
> If you make a ttest with a groupvar, you can use -statsmat-
> and -makematrix- (downloadable from ssc)(with -ttest-)
> followed by -mat2txt- (downloadable from ssc) to get a .txt file.
>
> Here is an example I used for one research project:
>
> statsmat size1, s(N mean sd) by(format_bs) mat(mat1)
> makematrix mat2, from(r(t) r(p)) label : ttest size1, by(format_bs)
> matrix mat3=mat2' //Transposition of the matrix
> matrix mat4 = mat1, mat3 // Grouping of the two matrices
> matrix colnames mat4 = "Number of observations" Mean
> "Standard deviation" "Student t-test"
> mat2txt, matrix(mat4) saving(univariate_bs) replace
>
> If you want to compare two variables with a ttest, here is
> another example and solution:
>
> makematrix T5A1, from(r(N) r(mean) r(sd) r(min) r(p50)
> r(max)) label : univar MAPE_direct_scal MAPE_indirect_scal if
> outlier_cfo_scal!=1 &outlier_MAPE!=1
> ttest MAPE_direct_scal = MAPE_indirect_scal if
> outlier_cfo_scal!=1 &outlier_MAPE!=1
> mat T5A2 = r(p) \ r(t)
> mat T5A3 = T5A1, T5A2
> matrix colnames T5A3 = N "Mean" "Std Dev" "Min" "Median"
> "Max" "T/p-value"
> mat2txt, matrix(T5A3) saving(stat_MAPE_table5A) replace
>
> The syntax might not the most effective but I know these
> commands work.
> >>> [email protected] 12/04/06 13:50 >>>
> The short answer is: Evidently not.
>
> However, as a t-test comparing two group means
> is really a regression in disguise, you
> should be able to use your favourite post-regression
> program for this purpose.
>
> Nick
> [email protected]
>
> Ina Ganguli
>
> > I was wondering whether there is a command (like -outreg-) I can use
> > to format and export multiple -ttest- results to a .txt file for
> > easier conversion to tables?
> >
> > I would like to have results in the following format:
> >
> > Group1 Group2 Difference
> > variable1 mean mean mean*
> > (se) (se) (se)
> > variable2 mean mean mean*
> > (se) (se) (se)
> > etc.
> >
> > I've seen references to commands that may perhaps be what I need
> > (-tabexport-, -parmby-?), but I wanted to check whether there is a
> > program/command out there that would work well for this.
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