# [R] svyboxplot - library (survey)

Thomas Lumley tlumley at uw.edu
Thu Oct 18 05:12:35 CEST 2012

On Thu, Oct 18, 2012 at 2:04 PM, Muhuri, Pradip (SAMHSA/CBHSQ)
> Hello,
>
> I understand that svyhist ()  provides density histograms with density values on the y-axis (R code shown below).  Is there a way one can have relative relative frequency histograms with relative freqencies on the y-axis?

You get frequencies just by asking for them with freq: compare
svyhist(~enroll, dstrat, main="Survey weighted",col="purple",freq=TRUE)
svyhist(~enroll, dstrat, main="Survey weighted",col="purple")

If you mean that you want the heights of the bars to sum to 1, the
simplest way I know of is to rescale the weights to sum to 1 and use
freq=TRUE

-thomas

> Any advice/help would be appreciated.
>
> Thanks,
>
>
>
>
>
>
> ###### svyhist - Density Histogram
>
> options( survey.lonely.psu = "adjust" )
> svyhist (~age_p,
>          subset (nhis, xspd2=='SPD'), breaks=MyBreaks,
>           ylim = c(0,0.040),
>          main= " ",
>          col="red",
>          xlab="Age at Interview (SPD Category)"
>          )
> lines (svysmooth(~age_p, bandwidth=5,subset(nhis, xspd2=='SPD')), lwd=2)
>
>
> ________________________________________
> From: Anthony Damico [ajdamico at gmail.com]
> Sent: Monday, October 01, 2012 10:07 AM
> Cc: R help
> Subject: Re: [R] svyboxplot - library (survey)
>
> using a slight modification of the example shown in ?svyboxplot
>
>
> library(survey)
>
> data(api)
>
> # create an example svydesign
> dstrat <- svydesign(id = ~1, strata = ~stype, weights = ~pw, data = apistrat,
>     fpc = ~fpc)
>
> # set the plot window to display 1 plot x 2 plots
> par(mfrow=c(1,2))
>
> # generate two example boxplots
> svyboxplot(enroll~stype,dstrat,all.outliers=TRUE)
> svyboxplot(enroll~1,dstrat)
>
> # done
>
>
>
> # alternative: not as nice
>
> # set the plot window to display 2 plots x 1 plot
> par(mfrow=c(2,1))
>
> # generate two example boxplots
> svyboxplot(enroll~stype,dstrat,all.outliers=TRUE)
> svyboxplot(enroll~1,dstrat)
>
> # done
>
>
>
>
>
>
>
> On Mon, Oct 1, 2012 at 9:50 AM, Muhuri, Pradip (SAMHSA/CBHSQ) <Pradip.Muhuri at samhsa.hhs.gov<mailto:Pradip.Muhuri at samhsa.hhs.gov>> wrote:
> Hello,
>
> I have used the library (survey) package for boxplots using the following code.
>
> Could anyone please tell me why I am getting only 1  boxplot instead of 2 boxplots (1-SPD,  2-No SPD).
>
> What changes in the following code would be required to get 2 boxplots in the same plot frame?
>
> Thanks,
>
>
> ###################################################
> nhis <- svydesign (id=~psu, strat=~stratum, weights=~wt8,
>             data=tor, nest=TRUE)
>
> svyboxplot (dthage~xspd2, subset (nhis, mortstat==1), col="gray80",
>              varwidth=TRUE, ylab="Age at Death", xlab="SPD Status: 1-SPD, 2=No SPD")
>
>
> Statistician
> Substance Abuse & Mental Health Services Administration
> The Center for Behavioral Health Statistics and Quality
> Division of Population Surveys
> 1 Choke Cherry Road, Room 2-1071
> Rockville, MD 20857
>
> Tel: 240-276-1070
> Fax: 240-276-1260
>
> The Center for Behavioral Health Statistics and Quality your feedback.  Please click on the following link to complete a brief customer survey:   http://cbhsqsurvey.samhsa.gov
>
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