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From |
Alpna Agrawal Kapur <alpna007@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: box plots of main effect relative risks |

Date |
Mon, 24 Sep 2012 10:13:56 -0500 |

Hello folks, I appreciate your help and multiple solutions offered. I will report back on what worked. Many thanks, Alpna On Mon, Sep 24, 2012 at 5:44 AM, Nick Cox <njcoxstata@gmail.com> wrote: > Alpna must speak for Alpna, but "whiskers" are not defined in the same > way by everyone. Tukey, the inventor of the term "box plot", but not > the idea, played with different ideas, but that most imitated is based > on this recipe: > > 1. calculate quartiles and thus their difference the IQR. > > 2. draw whiskers that extend to the (smallest, largest) data points > within [p25 - 1.5 IQR, p75 + 1.5 IQR]. > > 3. plot any points outside that interval individually. > > The recipe given by Roger here will often, but not always, give the > same result, depending on whether there are any points as defined by > #3. > > This is the recipe used by -graph box- and -graph hbox- and one that > is obtainable with -stripplot- (SSC). > > Nick > > On Mon, Sep 24, 2012 at 11:32 AM, Roger B. Newson > <r.newson@imperial.ac.uk> wrote: >> I don't know if Alpna really wanted to produce box plots or just confidence >> interval plots. However, as it happens, you CAN do box plots with whiskers >> using -eclplot-. This is done using the -baddplot()- option to add the >> whiskers. (That was my reason for adding the -baddplot()- option to >> -eclplot-.) >> >> As in: >> >> sysuse auto, clear; >> collapse (min) min=weight (p25) p25=weight (p50) p50=weight (p75) p75=weight >> (max) max=weight, by(foreign); >> list; >> eclplot p50 p25 p75 foreign, hori rplottype(rbar) baddplot(rspike min max >> foreign, hori) ylab(0 1); >> >> This code will produce a horizontal box plot, with the dots indicating >> medians, in front of the bars indicating 25th and 75th percentiles, in front >> of the whiskers indicating the minimum and the maximum car weight in the >> group. -eclplot- has numerous options that can be used to alter the look of >> the graph, including adding a scatter plot to include extreme data points. >> >> >> On 22/09/2012 08:11, Nick Cox wrote: >>> >>> -parmby-, -sencode-, -eclplot- are all user-written commands: you are >>> asked to explain where you got them. See Statalist FAQ. >>> >>> As I understand it, -eclplot- does not purpoort to do box plots with >>> whiskers. Therefore, use -graph box- or -graph hbox-. >>> >>> Nick >>> >>> On Sat, Sep 22, 2012 at 5:44 AM, Alpna Agrawal Kapur <alpna007@gmail.com> >>> wrote: >>> >>>> I would like to -- >>>> (1) produce box plots with whiskers of relative risks >>>> (2) graph the main effect relative risks from multiple regressions and >>>> produce box plots of all these relative risks in one graph. >>>> >>>> I am using Stata 10 >>>> >>>> The code I have tried -- >>>> parmby "xi: glm y x1 covar1 covar2 covar3, fam(poisson) link(log) >>>> nolog robust eform", label norestore eform >>>> sencode label, gene(parmlab) >>>> eclplot estimate min95 max95 parmlab >>>> >>>> parmby "xi: glm y x2 covar1 covar2 covar3, fam(poisson) link(log) >>>> nolog robust eform", label norestore eform >>>> sencode label, gene(parmlab) >>>> eclplot estimate min95 max95 parmlab >>>> >>>> Problems are -- >>>> (1) does not graph box plots with whiskers >>>> (2) I want to graph RRs of x1 and x2 together in same graph, but this >>>> code creates two different datasets and includes RRs for the >>>> covariates as well which I do not want. I'd like to create one dataset >>>> that only stores estimates x1 and x2, then graph these RRs as box >>>> plots with whiskers. > * > * 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/

**References**:**st: box plots of main effect relative risks***From:*Alpna Agrawal Kapur <alpna007@gmail.com>

**Re: st: box plots of main effect relative risks***From:*Nick Cox <njcoxstata@gmail.com>

**Re: st: box plots of main effect relative risks***From:*"Roger B. Newson" <r.newson@imperial.ac.uk>

**Re: st: box plots of main effect relative risks***From:*Nick Cox <njcoxstata@gmail.com>

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