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Re: st: graph bar, x-axis and dates

From   Nick Cox <>
Subject   Re: st: graph bar, x-axis and dates
Date   Thu, 21 Apr 2011 18:04:57 +0100

My script does not explain how to calculate percents. WIth -twoway
bar- or -twoway rbar- you do need to do that yourself.

gen pcspecial = 100 * nspecial / ntotal
gen pctotal = 100

On Thu, Apr 21, 2011 at 5:24 PM, Nick Cox <> wrote:
> This is just a standard example or -twoway bar- and/or -rbar-.
> clear
> set obs 360
> gen date = 144 + _n
> format date %tm_M_CY
> gen nspecial = floor(1000 * runiform())
> gen ngeneral = floor(1000 * runiform())
> gen ntotal = nspecial + ngeneral
> twoway bar nspecial date || rbar nspecial ntotal date, legend(order(1
> "special" 2 "general")) xla(180(60)460, format(%tm_CY))
> Special points:
> The height of the highest bar will be the sum of the heights of the
> bars it contains. You need to calculate that for yourself.
> In your case, your counts need to be constructed as
> egen nspecial = count(special), by(date)
> egen ngeneral = count(general), by(date)
> On Thu, Apr 21, 2011 at 4:57 PM, Ben Ammar <> wrote:
>> Hi everyone,
>> I've got a panel dataset, where I want show the developement of two different groups in the course of time which worked fine by the following command:
>> graph bar (count) special general, over (date) stack percentage
>> Unfortunately, since there are more than 30 years of monthly data, the x-axis is filled with dates that it can't be read anymore. Is there a way that the graph shows only years, preferably in 5 year steps?
>> I know that this is a time series graph so there should be in fact also a command like tsrline to avoid my problem. However I couldn't find anything that creates a graph like the above mentioned (stacked percentage of both groups in each month). I also checked "A visual guide to stata graphics" by Michael Mitchell but I couldn't find anything about a similar graph.

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