topic Re: Density scale for the histogram in Statistical Procedures

Density scale for the histogram

S_pera — Tue, 30 Nov 2021 11:49:50 GMT

Hi all

How can I get y scale as density for a histogram?

The histogram statement with proc univariate and proc sgplot support count, proportion and percentage but not density. It seems scale=density is available with proc sgplot, but it does not work with SAS On Demand for Academics.

I tried following codes in the PRoC Step.

proc univariate;
var y;
histogram y/yscale=density;
run;
proc sgplot;
histogram y/ scale=density;
run;

Appreciate an answer.

S_pera

Re: Density scale for the histogram

Ksharp — Tue, 30 Nov 2021 12:25:20 GMT

I don't understand you want COUNT or PERCENT ?

proc univariate data=sashelp.heart;
var weight;
histogram weight/vscale=count;
histogram weight/vscale=percent;
run;

Re: Density scale for the histogram

S_pera — Tue, 30 Nov 2021 12:34:03 GMT

I want the density.

Re: Density scale for the histogram

sbxkoenk — Tue, 30 Nov 2021 15:45:08 GMT

Hello,

To my knowledge, nor PROC UNIVARIATE, nor PROC SGPLOT have a SCALE=DENSITY on the HISTOGRAM statement.

At least not in SAS 9.4 M7 (maybe in VIYA?).

But PROC TEMPLATE can be used :

proc template;
  define statgraph histogram;
    begingraph;
      entrytitle "Histogram of Vehicle Weights";
      layout overlay /
        xaxisopts=(label="Vehicle Weight (LBS)")
        yaxisopts=(griddisplay=on);
        histogram weight / SCALE=DENSITY ;
      endlayout;	   
    endgraph;
  end;
run;

proc sgrender data=sashelp.cars template=histogram;
run;
/* end of program */

Koen

Re: Density scale for the histogram

S_pera — Tue, 30 Nov 2021 17:04:59 GMT

Dear Koen

Thank you very much for the solution. But I thought we could think of an easier code. Hope we will have the density option added to the histogram statement of PROC Univariate and/or PROC SGPLOT. In fact R is giving this with just

> hist(x,freq=F)

Anyway, the solution is highly appreciated.

S_pera