topic How to do a Very Simple Legend? in Graphics Programming

How to do a Very Simple Legend?

davehalltwp — Sat, 04 Nov 2017 13:50:37 GMT

As you know by now, I'm just learning about plotting!

I have developed a line plot of a mean across timepoints, with bars for 95% confidence interval. (PROC GPLOT) I'm trying to create a very simple legend, simply indicating that the red line is treatment group 1 and the blue line is treatment group 2. Everything I try generates stuff that I don't want.

Is there an easy way to populate the legend with something simple like this?

--- Placebo ---- Study Drug

Here is my code (I found it online and it does exactly what I need). Mean1 is the mean per session, Thresh1 contains LCM and UCM.

proc gplot data=prep5;    
     plot thresh1*session mean1*session thresh2*session mean2*session / overlay haxis=axis1 vaxis=axis2  
    /*legend=legend1*/;
 title1 h=8pt color=black font='courier' J=L "&titlel1";
 title2 h=8pt color=black font='courier' J=L "Protocol: &titlel2 													Page 1 of 1";

 title5 h=8pt color=black font='courier' J=C "&titlel5";
 title6 h=8pt color=black font='courier' J=C "&titlel6";
 title7 h=8pt color=black font='courier' J=C "&titlel7";
  
run;

Re: How to do a Very Simple Legend?

Cynthia_sas — Sat, 04 Nov 2017 15:41:03 GMT

I'd recommend investigating the LEGEND option for GPLOT and then the LEGEND statement. You currently have the LEGEND option commented out, I am guessing because you did not have a LEGEND1 statement.

Consider this example http://www2.sas.com/proceedings/forum2007/163-2007.pdf on page 2 with the use of the simple LEGEND option to place a legend on the plot.

Then, look on page 3 at the use of the LEGEND1 statement and legend=legend1 option. You should get an idea of how to do what you want.

Cynthia

Re: How to do a Very Simple Legend?

Reeza — Sat, 04 Nov 2017 16:03:02 GMT

If you're just learning graphing in SAS I would strongly recommend learning SG procedures instead of GPLOT procedures.

There is more on GPLOT currently - because it's really really old. SG is available in more versions of SAS, you have more control over your graphics and it produces much better quality graphics.

Re: How to do a Very Simple Legend?

Cynthia_sas — Sat, 04 Nov 2017 17:40:26 GMT

You'll need 9.2 or higher to run SGPLOT. I agree with Reeza that the SG procedures are easier to start with then the older SAS/Graph procedures.

Cynthia

Re: How to do a Very Simple Legend?

davehalltwp — Sat, 04 Nov 2017 19:25:31 GMT

Thanks, Cynthia. I went through Wendi's paper and was able to come up with something that'll be good enough.

I will definitely take yours and Reeza's advice and learn about SGPLOT!

Re: How to do a Very Simple Legend?

GraphGuy — Mon, 06 Nov 2017 16:10:30 GMT

I often use title or footnote statements to 'fake' a legend, to get one exactly like I want it.

In your case, you could use something like the following:

title8 c=blue "--- Placebo" c=red " --- Study Drug";