Dear, Nick, thanks for attempting to resolve my question, though the
code fragment did not help. Please, below are 20 cases, covering 3
different strata, as well as their respective values on the index
variable of interest (i.e., score), for your examination. What I want
is the count or proportion of each value of the index variable (i.e.,
score) in each strata.
Cluster Hhold# Line# Strata score
46 7 1 1 0
122 20 4 1 0
122 6 2 1 1
46 1 1 1 2
122 11 2 1 1
122 6 1 1 0
122 16 6 2 0
46 13 1 2 1
46 12 1 2 2
122 17 1 2 0
122 8 2 2 1
46 13 3 2 1
122 5 2 2 0
46 6 3 3 1
122 16 2 3 0
122 15 1 3 2
46 4 2 3 0
46 19 3 3 1
122 4 2 3 0
46 20 4 3 2
So from this scratch data we can have the following distribution of
the 3 score values by strata:
ScoreValues Strata1 Strata2 Strata3 Total
0 3 3 3 9
1 2 3 2 7
2 1 1 2 4
N 20
Thus, we can state that across all strata 9 individuals had a score of
0, 7 had a score of 1 and 4 had a score of 2 -- that is we aggregate
or count each of the values of the index variable (Score) across or
over all strata. In this way I can describe the distribution of the
scores over the strata.
I hope this makes it a bit clearer. If, not please let me know and I
can try and provide further clarification.
rgds, Em
------------------------------------------------------------------
On Mon, Jun 29, 2009 at 4:30 PM, Nick Cox <[email protected]> wrote:
>
> A meta-question here is why no one has replied to this since it was
> posted. An answer to that is that trying to work out what is wanted
> requires too much effort. Why not give an example of your data? Why make
> everyone try to imagine what you have?
>
> Anyway, my guesses are:
>
> 1. You have a long data structure with personal id (say -id-) and
> stratum id (say -stratum-). (One stratum, several strata.)
>
> 2. You have a variable (say -score-) with values 0,1,2. (What that
> variable represents, how many negative attitudes the others in the
> stratum have, it seems, is not important here.)
>
> 3. You want to summarize the fractions of 0, 1, 2 in each stratum.
>
> If these guesses are all correct, then one answer is
>
> bysort stratum score : gen freq = _N
> by stratum: gen total = freq / _N
>
> You may also want to -collapse- the data.
>
> If these guesses are wrong, you may need to try again with more
> information.
>
> Nick
> [email protected]
>
> Emmanuel Koku
>
> I have created a summed scale of 2 dichotomous items coded originally
> 0 1. The new variable now has values ranging from 0 to 2.
>
> Since I am using a survey that I want to create summary measures like
> non-self mean or non-self proportions that represent other members of
> the respondents strata but excluding the respondent. Eg. I would want
> to know the proportion of the respondents strata who hold no negative
> attitudes - ie 0 in the summed scale; the proportion who hold only one
> of the negative attitudes, ie, 1 in the summed scale as well as those
> members of the strata who hold both negative values or 2 in the summed
> scale.
>
> Through help received here and from a statafaq article, i have been
> able to create similar summary measures for dichotomous items, but i'm
> stumped with this 3-category variable, and would appreciate any
> assistance.
>
>
> *
> * 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/
