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Re: st: Adding kwallis p value to multiple graphs


From   Colin Campbell <col.campbell@rocketmail.com>
To   "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu>
Subject   Re: st: Adding kwallis p value to multiple graphs
Date   Mon, 24 Sep 2012 04:00:22 -0700 (PDT)

Thank you Nick, 

That works a treat, I see where I went wrong. I had tried something similar to your suggestion but had an extra ` in there.

Colin

p.s. apologies if the reply appears as a new post but I picked up your answer from the Statalist archives as it has not appeared in my inbox so I was not able to reply directly.

I have copied the thread title of your answer in the hope it is filed correctly. 



On Mon, 24 Sep 2012 10:38:06 AM, Nick Cox <njcoxstata@gmail.com> wrote:

Try this. Note that the local macro -p- referred to in your code
segment does not appear to have been defined.

levelsof new_diag, local(levels)
foreach l of local levels {

    foreach var of varlist sex agegroup risk_group origen_redux education_bin {

        kwallis risk_score if new_diag ==`l', by(`var')
        local `l'_`var' = chi2tail(r(df), r(chi2))
    }
twoway kdensity risk_score if new_diag ==`l' & sex ==1 || ///
    (kdensity risk_score if new_diag ==`l' & sex ==2), ///
    title("Sexual risk score by sex", position(12)) ///
    ytitle("Density") ///
    xtitle("Risk score", size(small)) ///
    legend(cols(1) label(1 "Male") label(2 "Female") ring(0)
position(10) size(small)) ///
    note("``l'_sex''", ring(0) position(6)) ///
    saving(`l'_1, replace)  scheme(tufte)

twoway kdensity risk_score if new_diag ==`l' & agegroup ==1 || ///
    (kdensity risk_score if new_diag ==`l' & agegroup ==2) || ///
    (kdensity risk_score if new_diag ==`l' & agegroup ==3) || ///
    (kdensity risk_score if new_diag ==`l' & agegroup ==4), ///
    title("Sexual risk score by age group", position(12)) ///
    ytitle("Density") ///
    xtitle("Risk score", size(small)) ///
    legend(cols(1) label(1 "<30") label(2 "30-39") label(3 "40-49")
label(4 "50+") ring(0) position(10) size(small)) ///
    note("``l'_agegroup''", ring(0) position(2)) ///
    saving(`l'_2, replace)  scheme(tufte)

}

On Mon, Sep 24, 2012 at 10:13 AM, Nick Cox <njcoxstata@gmail.com> wrote:
> The problem with your code is that the local macro -var- is undefined,
> equivalently empty, outside the -foreach- loop.
>
> Nick
>
> On Mon, Sep 24, 2012 at 10:03 AM, Colin Campbell
> <col.campbell@rocketmail.com> wrote:
>
>> I am drawing several graphs within a loop and wish to insert a p value from kwallis into each one in the -note- option.
>> How can this be achieved without sacrificing the loop? My attempt at this is shown below.
>> I think the problem is in naming the macro(s) that hold(s) the individual p results.
>> The new_diag variable take values of 0 or 1 so each graph is drawn twice and needs a different p value.
>>
>> Any assistance appreciated to face this challenge with fortitude.
>>
>> Colin
>>
>> levelsof new_diag, local(levels)
>> foreach l of local levels {
>>
>>     foreach var of varlist sex agegroup risk_group origen_redux education_bin {
>>
>>         kwallis risk_score if new_diag ==`l', by(`var')
>>         local `l'_`var' = chi2tail(r(df), r(chi2))
>>     }
>> twoway kdensity risk_score if new_diag ==`l' & sex ==1 || ///
>>     (kdensity risk_score if new_diag ==`l' & sex ==2), ///
>>     title("Sexual risk score by sex", position(12)) ///
>>     ytitle("Density") ///
>>     xtitle("Risk score", size(small)) ///
>>     legend(cols(1) label(1 "Male") label(2 "Female") ring(0) position(10) size(small)) ///
>>     note("`l'_`var'", ring(0) position(6)) ///
>>     saving(`l'_1, replace)  scheme(tufte)
>>
>> twoway kdensity risk_score if new_diag ==`l' & agegroup ==1 || ///
>>     (kdensity risk_score if new_diag ==`l' & agegroup ==2) || ///
>>     (kdensity risk_score if new_diag ==`l' & agegroup ==3) || ///
>>     (kdensity risk_score if new_diag ==`l' & agegroup ==4), ///
>>     title("Sexual risk score by age group", position(12)) ///
>>     ytitle("Density") ///
>>     xtitle("Risk score", size(small)) ///
>>     legend(cols(1) label(1 "<30") label(2 "30-39") label(3 "40-49") label(4 "50+") ring(0) position(10) size(small)) ///
>>     note("`p'", ring(0) position(2)) ///
>>     saving(`l'_2, replace)  scheme(tufte)
>>
>> }
>>

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