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From |
Nick Cox <njcoxstata@gmail.com> |

To |
statalist@hsphsun2.harvard.edu |

Subject |
Re: st: multiple CI/mean plots in one graphic |

Date |
Fri, 29 Apr 2011 09:42:34 +0100 |

The commands are (on separate lines) sysuse auto, clear statsby mean=r(mean) ub=r(ub) lb=r(lb) , by(foreign rep78) : ci weight separate mean, by(foreign) veryshortlabel separate ub, by(foreign) veryshortlabel separate lb, by(foreign) veryshortlabel scatter mean0 mean1 rep78 || rcap ub0 lb0 rep78 || rcap ub1 lb1 rep78, legend(order(1 2)) Note that the command -separate- is spelled in that way, but Stata does for once indulge the spelling -seperate- when used for the command. See http://www.stata.com/statalist/archive/2008-11/msg00939.html for the story. On Fri, Apr 29, 2011 at 8:17 AM, Pieter-Jan <duikerarts@home.nl> wrote: > Dear Nick, > > Thanks for your reply. I tried to dally around with the auto database and > use the commands your wrote down > > Sysuse auto, clear > statsby mean=r(mean) ub=r(ub) lb=r(lb), by(foreign rep78): ci weight > seperate mean, by(foreign) veryshortlabel seperate ub, by(foreign) > veryshortlabel seperate lb, by(foreign) veryshortlabel scatter mean0 mean1 > rep78 || rcap ub0 lb0 rep78 || rcap ub1 lb1 rep78, legend(order(1 2)) > > This gave me the error message > invalid 'by' > r(198); > > As I use the individual commands > statsby mean=r(mean) ub=r(ub) lb=r(lb), by(foreign rep78): ci weight > seperate mean > (running ci on estimation sample) > variable seperate not found > an error occurred when statsby executed ci > r(111); > > Tried to axecute without the separate mean commands > statsby mean=r(mean) ub=r(ub) lb=r(lb), by(foreign rep78): ci weight > (running ci on estimation sample) > > command: ci weight > mean: r(mean) > ub: r(ub) > lb: r(lb) > by: foreign rep78 > > Statsby groups > ----+--- 1 ---+--- 2 ---+--- 3 ---+--- 4 ---+--- 5 > ........ > > . by(foreign) veryshortlabel seperate ub > : required > r(100); > > I think I did something wrong regarding the commands but can not figure out > what. Is there a simple solution? > Thanks > > Pieter-Jan van Ooij > > > -----Oorspronkelijk bericht----- > Van: owner-statalist@hsphsun2.harvard.edu > [mailto:owner-statalist@hsphsun2.harvard.edu] Namens Nick Cox > Verzonden: 28 april 2011 21:40 > Aan: statalist@hsphsun2.harvard.edu > Onderwerp: Re: st: multiple CI/mean plots in one graphic > > -civplot- is a user-written plot from SSC written in 1999 for Stata 6. > I am not surprised that it does not separate out different groups > given a command > > . civplot variable1, by(time) > > as the command does not even mention -group-. Also, as -njc_stuff- > (also SSC) documents, -civplot- is considered obsolete given -ciplot- > (also SSC). > > But better than either is to do it yourself using the principles described > in > > Cox, N.J. 2010. Speaking Stata: The statsby strategy. Stata Journal > 10, 143-151. > http://www.stata-journal.com/article.html?article=gr0045 > > The following problem has essentially similar structure to yours and > shows some technique > > sysuse auto, clear > statsby mean=r(mean) ub=r(ub) lb=r(lb) , by(foreign rep78) : ci weight > separate mean, by(foreign) veryshortlabel > separate ub, by(foreign) veryshortlabel > separate lb, by(foreign) veryshortlabel > scatter mean0 mean1 rep78 || rcap ub0 lb0 rep78 || rcap ub1 lb1 rep78, > legend(order(1 2)) > > However, note that what you have done so far implies that separate > days are independent, which may not be quite right! > > Nick > > On Thu, Apr 28, 2011 at 6:33 PM, Pieter-Jan <duikerarts@home.nl> wrote: > >> Recently we performed a randomized crossover study in which we monitored > the >> lung function of a group of volunteers during three days. Day 1 was used > to >> determine baseline lung function whereas day 2 and 3 were used to monitor >> lung function after inhaling either placebo (air) or active gas (oxygen) >> under hyperbaric condition. During each measurement day lung function was >> measured 6 times. All variables and observations were put in a dataset > which >> initially had the following format: >> >> ID Group Time Variable1 etc >> 1 0 0 6.19 >> 2 0 0 5.97 >> Etc >> >> ID exist of 13 persons >> Group: 0 (baseline), 1 (placebo), 2 (active) >> Time: 0, 2, 4, 8, 12, 22 hours after exposure >> >> To give the reader a good overview how f.e. variable 1 changes over time >> within the 3 groups I want to plot the CI and mean of each group on each >> time point in one graphic. I tried civplot >> >> Civplot variable1, by(time) >> >> But that gives me no separate plots of the three groups. >> >> I tried to change the dataset by deleting the group variable and changing >> the Variable1 etc as follows >> >> ID Time Variable1_baseline Variable1_placebo >> Variable1_active etc >> 1 0 6.19 6.01 >> 6.11 >> 2 0 5.97 6.05 >> 5.91 >> >> Civplot variable1_baseline, by(time) >> >> This allows me only 1 civplot for each variable but just like the first >> attempt this gave me only 1 plot per graphic. I tried also twoway >> >> Twoway (scatter variable1_baseline time) (fpfit variable1_baseline time) >> (scatter variable1_placebo time) (fpfit variable1_placebo time) (scatter >> variable1_active time) (fpfit variable1_active time) >> >> And this gives the possibilities of putting multiple plots in one graphic >> but specially the scatter makes it cluttered. A simple CI/mean would >> counteract this. >> >> Is there a possibility in Stata of putting multiple CI/mean plots into one >> graphic? Maybe the answer speaks for itself but I am rather new into Stata >> that's why I asking this question. * * 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/

**Follow-Ups**:**RE: st: multiple CI/mean plots in one graphic***From:*"Pieter-Jan" <duikerarts@home.nl>

**References**:**st: multiple CI/mean plots in one graphic***From:*"Pieter-Jan" <duikerarts@home.nl>

**Re: st: multiple CI/mean plots in one graphic***From:*Nick Cox <njcoxstata@gmail.com>

**RE: st: multiple CI/mean plots in one graphic***From:*"Pieter-Jan" <duikerarts@home.nl>

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