topic Box Plots in SAS Programming

Box Plots

MarioAQ — Wed, 08 Jul 2020 16:50:35 GMT

I have two variables trigliceridbefore and trigliceridafter I want to create a boxplot I cannot find the way. I did separately, but no in the same graphic.

Re: Box Plots

Reeza — Wed, 08 Jul 2020 16:58:35 GMT

Depends on your data structure partly. Can you show an example of your data and what you've tried so far?

There are many tutorials out there and here's a link to one. The code is at the bottom of the page to download or you should be able to run it directly if you copy/paste it.
https://blogs.sas.com/content/graphicallyspeaking/2016/12/08/getting-started-sgplot-part-3-vbox/

Re: Box Plots

PaigeMiller — Wed, 08 Jul 2020 17:00:56 GMT

You don't show your data, but the data has to be arranged properly if you want both boxplots together in one plot.

Something like this:

data for_plot;
     input before_after $ triglyceride;
     cards;
before 24
after 31
before 39
after 33
...
before 66
after 70
;

So if your data is not in this form, you will have to manipulate it.

Re: Box Plots

PGStats — Wed, 08 Jul 2020 17:48:36 GMT

Here is an example to get you started:

data test;
input id  trigliceridbefore   trigliceridafter;
datalines;
1   10.04   11.62
2   10.24   11.98
3   10.76   11.48
4   10.41   11.31
5   10.56   11.56
6   10.62   11.31
7   10.52   11.40
8   10.69   11.13
9   10.31   11.74
10  10.10   11.45
;

proc transpose data=test out=graphData;
by id;
var triglicerid: ;
label trigliceridbefore="Before"   trigliceridafter="After";
run;

proc sgplot data=graphData noautolegend;
vbox col1 / category=_label_;
xaxis display=(nolabel) reverse;
yaxis label="Triglicerides (<Units>)";
run;