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From |
Timothy Colbourn <[email protected]> |

To |
Statalist <[email protected]> |

Subject |
Re: Re: st: plot yline for different values on each sub plot |

Date |
Tue, 19 Apr 2011 11:28:06 +0200 |

Thanks Nick, This method (plotting several twoway graphs at one - some bar and one a line) works well. For those interested my new code is: twoway (bar livebirth month, barw(0.4)) (bar stillbirth month, barw(0.4)) (bar nnd month, barw(0.4)) /// (bar mvital month, barw(0.4)) (line expbirths month, lcolor(red)), /// ylabel(0(50)350, labsize(small) angle(0)) ytitle("frequency") xlabel(569(2)611, labsize(vsmall) angle(90)) /// xtitle("Month") by(, title("Births and deaths in each RCT arm", size(small)) note("")) /// legend(order(1 "Livebirths" 2 "Stillbirths" 3 "Neonatal Deaths" 4 "Maternal Deaths" 5 "Expected Births") size(vsmall)) by(arm) The only issue is that instead of the 4 bars for each of the different bar variables (livebirth, stillbirth, nnd and mvital) being plotted beside each other for each month they are plotted on top of each other. Although I think I may remove stillbirth, nnd and mvital from these graphs anyway as they are small numbers, so it is not an issue for me at this time.. Cheers, Tim __________________________________ Tim Colbourn Research Fellow and part-time PhD student, Centre for International Health and Development, UCL Institute of Child Health, 30 Guilford Street, London WC1N 1EH [email protected] based full-time in Malawi Tel: Office: +265 1 758 476 Mobile: +265 888 159 231 > Date: Fri, 15 Apr 2011 11:57:32 +0100 > From: Nick Cox <[email protected]> > Subject: Re: st: plot yline for different values on each sub plot > > I couldn't get the editing approach to work. That just means what it > says: I am not at all familiar with all that the Graph Editor can so. > > This code indicates some technique that might help. Most of it just > sets up an example. The key idea is that a different horizontal line > can be drawn for a variable that is constant in each panel. It is not > a -yline()- and is drawn only over the range of the data. > > sysuse auto, clear > contract foreign rep78, zero > graph bar (asis) _freq , over(rep78) by(foreign) > egen mean = mean(_freq), by(foreign) > twoway bar _freq rep78, barw(0.5) xla(1/5) || line mean rep78, by(foreign) > > On Fri, Apr 15, 2011 at 10:16 AM, Nick Cox <[email protected]> wrote: >> I don't know an easy way of doing this. You might try plotting all >> four lines in all panels and then deleting three you don't need in the >> Editor. Or you might draw each graph separately and then use -graph >> combine-. Or you might rewrite using -twoway bar-. >> >> Either way, your macro manipulation is not going to work as you >> intend. Stata interprets your >> >> `= ' >> >> stuff precisely once and _before_ the -graph- command gets to work. It >> certainly does not do that separately for each separate graph, and it >> will always interpret a reference to a variable as a reference to its >> value in the first observation. >> >> Of course, wanting a different yline in each panel is a perfectly >> reasonable request, but I think you will need to do it in one of the >> ways mentioned above. >> >> Nick >> >> On Fri, Apr 15, 2011 at 9:56 AM, Timothy Colbourn >> <[email protected]> wrote: >> >>> I have a bar graph plotted 4 times in one for each different arm of the trial I am analysing: by(arm) >>> >>> I have ploted a yline showing the expected number of births in each arm: yline(`=expbirths') which is a reference against the observed births bars plotted for each month (x axis). The problem is that Stata plots the yline on each of the 4 sub plots at the same value - the value for the first sub plot (arm) - rather than at the value for each arm on each subplot. I have tried yline(`=expbirths by(arm)') but it does the same thing (with no error message - i.e. it essentially ignores the by(arm). The full syntax for the graph is: >>> >>> graph bar (asis) livebirth stillbirth nnd mvital, over(month, label( labsize(vsmall) angle(90))) /// >>> ylabel(0(50)550, labsize(small) angle(0)) yline(`=expbirths (arm)') ytitle("frequency") /// >>> by(, title("Births and deaths in each RCT arm", size(small)) note("")) /// >>> legend(order(1 "Livebirths" 2 "Stillbirths" 3 "Neonatal Deaths" 4 "Maternal Deaths") size(vsmall)) by(arm) >>> >>> Is it possible to plot the yline for each value of expbirths on each subplot? > * * 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/

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