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Melk
Lapis Lazuli | Level 10

I am running a vertical bar chart for stat=median and would like an upper error bar to represent the 3rd quartile of the IQR. Is there a way to do this? I think error bars are only displayed when stat = mean?

 

proc sgplot data=dat;
    vbar x/ response=y stat=median;
run;

 

 

1 ACCEPTED SOLUTION

Accepted Solutions
Jay54
Meteorite | Level 14

For such custom situations, you will need to compute the median and 3rd quartile values by category using PROC MEANS.  Then you can use vbarparm to plot the bar chart of median by category and overlay a scatter of median by category with upper x-error bar to display the quartile.  You can set the scatter marker size to zero.

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2 REPLIES 2
Jay54
Meteorite | Level 14

For such custom situations, you will need to compute the median and 3rd quartile values by category using PROC MEANS.  Then you can use vbarparm to plot the bar chart of median by category and overlay a scatter of median by category with upper x-error bar to display the quartile.  You can set the scatter marker size to zero.

ballardw
Super User

Or using more of a "draw" it approach using NEEDLE statement with pre-summarized data:

 

proc summary data=sashelp.class nway;
   class sex;
   var weight;
   output out=plot (drop=_:) median= Q3= /autoname;
run;

   
proc sgplot data=plot;
  needle x=sex y=weight_q3 /markers markerattrs=(symbol=tack);
  vbarparm category=sex response=weight_median/ name='bar';
  keylegend 'bar';
run;

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