topic Re: Bubble plot: proportional scaling with discrete axes and axis spacing in Graphics Programming

Bubble plot: proportional scaling with discrete axes and axis spacing

JacquesR — Tue, 09 Nov 2021 03:28:57 GMT

I am battling to get the right proportional representation I need.

I am trying to plot the median number of patients and the median number of beds for different hospital types in different study arms.

data demo;
  infile datalines dsd truncover;
  input @1 Hospital_Type $2. @4 Rx $1. @6 NHospitals 2. @9 NPatients 5.1 Beds 5.1;
  format Beds BEST.;
  label Hospital_Type="Hospital Type" Rx="Study Arm" NPatients="Frequency Count" Beds="Beds";
datalines;
BH E 1  291   117
BH T 1  567   287
BH G 4  655   265
DH E 8  196.5 109
DH T 10 290.5 113.5
DH G 10 217.5 99.5
PU E 12 89    50
PU T 7  47    60
PU G 9  61    48
RH E 7  37    34
RH T 10 47.5  32.5
RH G 5  30    16
;;;;
run;
proc print data=demo;run;
proc sgplot
	noautolegend
	noborder
	data=demo;
	y2axis display=none;
	bubble x=Hospital_Type y=Rx size=Beds
	/nofill proportional datalabel=Beds datalabelattrs=(color=black size=8 weight=bold) datalabelpos=center;
	bubble x=Hospital_Type y=Rx size=NPatients
	/y2axis nofill proportional lineattrs=(pattern=2) datalabel=NPatients datalabelattrs=(color=black size=8 weight=bold style=italic) datalabelpos=top;
run;

This is what I got:

Absscale does not work, because the axes are discrete.

I tried mucking around with bradiusmax, and got this:

	bubble x=Hospital_Type y=Rx size=Beds
	/nofill proportional bradiusmax=28.7 datalabel=Beds datalabelattrs=(color=black size=8 weight=bold) datalabelpos=center;
	bubble x=Hospital_Type y=Rx size=NPatients
	/y2axis nofill proportional bradiusmax=65.5 lineattrs=(pattern=2) datalabel=NPatients datalabelattrs=(color=black size=8 weight=bold style=italic) datalabelpos=top;

I'm not entirely convinced that that is right, but my eyes might be fooling me. I need each bubble to represent the proportional surface area of the actual value it represents.

Also, I need the spacing on the y axis to be greater, so that the bubbles do not overlap and the labels are accordingly easier to interpret.

Any help would be greatly appreciated.

Re: Bubble plot: proportional scaling with discrete axes and axis spacing

Ksharp — Tue, 09 Nov 2021 12:07:17 GMT

You could try to change data structure and make graph bigger to avoid overlap problem.

data demo;
  infile datalines dsd truncover;
  input @1 Hospital_Type $2. @4 Rx $1. @6 NHospitals 2. @9 NPatients 5.1 Beds 5.1;
  format Beds BEST.;
  label Hospital_Type="Hospital Type" Rx="Study Arm" NPatients="Frequency Count" Beds="Beds";
datalines;
BH E 1  291   117
BH T 1  567   287
BH G 4  655   265
DH E 8  196.5 109
DH T 10 290.5 113.5
DH G 10 217.5 99.5
PU E 12 89    50
PU T 7  47    60
PU G 9  61    48
RH E 7  37    34
RH T 10 47.5  32.5
RH G 5  30    16
;;;;
run;

data demo1;
 set demo;
 label='Beds';size=Beds;output;
 label='NPatients'; size=NPatients;output;
run;

ods graphics/ height=600px width=800px;
proc sgplot 
 noautolegend
 noborder
 data=demo1;
 
 bubble x=Hospital_Type y=Rx size=size
 /group=label nofill proportional bradiusmax=65.5 datalabel=size
     datalabelattrs=(color=black size=8 weight=bold) datalabelpos=top;
run;

Re: Bubble plot: proportional scaling with discrete axes and axis spacing

GraphGuy — Fri, 12 Nov 2021 02:17:45 GMT

I think you need to first work on your input statement - I believe it is reading in some values incorrectly. For example, I believe it is reading in the DH E number of beds as 10.9, rather than 109.

Re: Bubble plot: proportional scaling with discrete axes and axis spacing

JacquesR — Fri, 12 Nov 2021 03:02:19 GMT

Nope, sorry, it's not that.

What I mean is that the underlying data are sound, even though you have correctly spotted an error.

I have the data as PROC FREQ output from a larger dataset and wanted to provide working data for whoever might want to take this on.

I generated the data step from the actual underlying dataset with https://blogs.sas.com/content/sastraining/2016/03/11/jedi-sas-tricks-data-to-data-step-macro/

It didn't do a perfect job, so I modified it a bit, and messed it up.

Apologies for that.

Here is the correct data step:

data demo;
  infile datalines dsd truncover;
  input @1 Hospital_Type $2. @4 Rx $1. @6 NHospitals 2. @9 NPatients 5.1 @15 Beds 5.1;
  label Hospital_Type="Hospital Type" Rx="Study Arm" NPatients="Frequency Count" Beds="Beds";
datalines;
BH E 1  291.0 117.0  
BH T 1  567.0 287.0  
BH G 4  655.0 265.0  
DH E 8  196.5 109.0  
DH T 10 290.5 113.5
DH G 10 217.5  99.5
PU E 12  89.0  50.0  
PU T 7   47.0  60.0  
PU G 9   61.0  48.0  
RH E 7   37.0  34.0  
RH T 10  47.5  32.5
RH G 5   30.0  16.0  
;;;;
run;
proc print data=demo;run;

Re: Bubble plot: proportional scaling with discrete axes and axis spacing

JacquesR — Fri, 12 Nov 2021 04:40:02 GMT

Thanks @Ksharp

You forgot about the variable length for label (which I named PlotGroup below), and the data labels were superimposed, but overall, your suggestion got me more or less what I wanted. This is how I tweaked it:

data demo;
    set demo;
    PlotGroup='Beds    ';Size=Beds;OUTPUT;
    PlotGroup='Patients'; size=NPatients;output;
run;
proc sgplot
	noautolegend
	noborder
	data=demo;
	y2axis display=none;
	bubble x=Hospital_Type y=Rx size=Size /group=PlotGroup nofill proportional bradiusmax=65.5 name="bubble";
    text x=Hospital_Type y=Rx text=size /position=center group=PlotGroup groupdisplay=cluster textattrs=(size=10 weight=bold);
    keylegend "bubble";
run;