This SAS Note provides a sample on how to use the SGPLOT procedure to create a butterfly plot with labels within the bars. 

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These sample files and code examples are provided by SAS Institute Inc. "as is" without warranty of any kind, either express or implied, including but not limited to the implied warranties of merchantability and fitness for a particular purpose. Recipients acknowledge and agree that SAS Institute shall not be liable for any damages whatsoever arising out of their use of this material. In addition, SAS Institute will provide no support for the materials contained herein.

/* Create sample data for males and females in 
   different age groups */
data ButterFly;
  length AgeGroup $12; 
  do AgeGroup='Pre Teen', 'Teen', 'Young Adult', 'Adult', 'Senior';
    Male=round(500*(1+ranuni(2))); 
    /* Make the bars for the male group draw to the left by 
       making the value negative */
   Male=-male;
   Female=round(400*(1+ranuni(2))); zero=0; 
   output;
  end;
run;

/* Create a format to display Male and Female count values 
   as positive numbers */
proc format;
  picture positive low-<0='0000' 0<-high='0000';
run;

ods graphics / reset width=6in height=4in imagename="ButterflyChart";

title 'Population by Age and Sex';
proc sgplot data=ButterFly noautolegend;
  format male female positive.;
  hbarparm category=agegroup response=male / dataskin=sheen name='m' 
    fillattrs=graphdata1 datalabel=male datalabelattrs=(size=10) transparency=0.2;
  hbarparm category=agegroup response=female / dataskin=sheen name='f'
    fillattrs=graphdata2 datalabel=female datalabelattrs=(size=10) transparency=0.2;
  text x=zero y=agegroup text=agegroup/  textattrs=(size=11 weight=bold);
  keylegend 'm' 'f';
  xaxis values=(-1000 to 1000 by 200) display=(nolabel) grid offsetmin=0.05 offsetmax=0.05;
  yaxis display=(noticks novalues nolabel);
run;

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These sample files and code examples are provided by SAS Institute Inc. "as is" without warranty of any kind, either express or implied, including but not limited to the implied warranties of merchantability and fitness for a particular purpose. Recipients acknowledge and agree that SAS Institute shall not be liable for any damages whatsoever arising out of their use of this material. In addition, SAS Institute will provide no support for the materials contained herein.

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