Boundary for band in SGPLOT

linlin87 — Tue, 01 Aug 2023 08:36:01 GMT

Hello SAS Community,

I use band to annotate graph with gray box. But I need box to finish at x=0, and it keep going. How I stop the grey box at 0, just get the yellow area (below)?

I use code:


data boundary;
do x = -0.002 to 0 by .00001;            
	up1=0;
	output;
end;
run;
 
data plot;
set plot_data boundary;
run;

proc sgplot data=plot;
   band x=x upper=0 lower=-0.002 / fillattrs=(transparency=0.5 color=gray);
   yaxis max = 0.005 grid;
   xaxis max = 0.005 grid;
run;

Thank you for help!

Re: Boundary for band in SGPLOT

FreelanceReinh — Tue, 01 Aug 2023 09:31:39 GMT

Hello @linlin87,

I think the issue is that you specify a constant value in the UPPER= option of the BAND statement rather than the variable UP1, which you defined in the BOUNDARY dataset. So try this:

band x=x upper=up1 lower=-0.002 / fillattrs=(transparency=0.5 color=gray);

Depending on the content of dataset PLOT_DATA and how you use it in your real PROC SGPLOT step, other techniques to limit the gray box include:

the NOEXTEND option of the BAND statement

defining a step function in the BOUNDARY dataset:

data boundary;
do x = -0.002 to 0.005 by .0001; 
  x=round(x,1e-9);
  if x<=0 then up1=0;
  else up1=-0.002;
  output;
end;
run;

If the box doesn't look exactly rectangular, you may also want to add the TYPE=STEP option to the BAND statement.

topic Re: Boundary for band in SGPLOT in New SAS User

Boundary for band in SGPLOT

Re: Boundary for band in SGPLOT