[R] bi-directional bar chart with a central axis

[David Winsemius]

On 9/17/19 3:14 PM, Sabatier, Jennifer F. (CDC/DDPHSIS/CGH/DGHP) via 
R-help wrote:
> Hi R-help,
>
> I have this data:
>
> my.dta <-data.frame(matrix(c(
> 26.3,	21.4,
> 20.1,	13.4,
> 7.9,	3.9,
> 16.5,	14.6,
> 5.3,	3.6,
> 38.6,	25.6,
> 34.4,	21.6,
> 77.4,	79.5,
> 58.2,	56.1,
> 80.5,	84,
> 37.7,	31.9,
> 19.9,	28.1,
> 6.2,	5.9	
> ), nrow=13, ncol=2, byrow=T,
> dimnames=list(c('A',	'B',	'C',	'D', 	'E',	'F',	'G',   'H',	'I',	'J',	'K',	'L',	'M'),
> c("Males", "Females"))
> ))
>
> I want to make a graph that looks like this:
>
> https://i1.wp.com/stephanieevergreen.com/wp-content/uploads/2012/11/backtoback11.jpg?resize=864%2C379&ssl=1


I suppose it helps to know that these are called "pyramid charts" 
because of their common use in demographic circles for displaying 
comparative population structures of men and women ("population pyramids").


https://markmail.org/search/?q=list%3Aorg.r-project.r-help+pyramid+chart


Also look in the plotrix package since I seem to remember that it has 
one nicely documented and illustrated.

-- 

David.

>
> Any help would be highly appreciated!
>
> Best,
>
> Jen
>
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