topic SGPLOT histogram with freq data? in Graphics Programming

SGPLOT histogram with freq data?

Steffenhaldrup — Sun, 06 Mar 2016 18:37:36 GMT

Hi all.

Isn't is possible to create a histogram/density in SGPLOT with data created in Proc Freq? I have data similar to this;

So, I need six bars and a density plot - but it seems impossible for me to do it.

Thanks.

Re: SGPLOT histogram with freq data?

Jay54 — Sun, 06 Mar 2016 18:54:13 GMT

If you have already computed the frequencies for each bin, you can use the GTL HistogramParm statement. But that statement is not available in SGPLOT. However, you can use the VBARPARM statement to create a histogram-like plot.

proc sgplot data=hist;
vbarparm category=x response=y / barwidth=1;
run;

Re: SGPLOT histogram with freq data?

Rick_SAS — Sun, 06 Mar 2016 20:40:52 GMT

If you used PROC FREQ to tabulate the percentages, then presumably you are treating the data as discrete. As Sanjay points out, use a bar chart for discrete data.

However, if you want to use pre-tabulated data to create a histogram, you can do it but you need COUNTS rather than PERCENTAGES. PROC FREQ outputs counts, or if you know the total sample size you can create the counts, as follows;

data A;
N = 100;
input x y;
count = N*y;  /* create counts from percentages */
datalines;
1 0.10
2 0.20
3 0.30
4 0.20
5 0.15
6 0.05
;

proc sgplot data=A;
histogram x / freq=count binwidth=1;
density x / freq=count type=kernel;
run;