Hello all,
I am trying to lay a regression line on each of two different (half) series covering different times of period.
proc sql;
create table have as
select date
, region
, sum(sale) as sale
from sashelp.pricedata
group by region, date
order by region, date
;
quit;
data have2;
set have (rename=(region=period));
if period=3 then delete;
if period=2 then monthyear=intnx('year',date,5, "sameday");
else monthyear=date;
drop date;
format monthyear monyy5.;
run;
/*CODE 1 PRODUCES SERIES AS EXPECTED*/
proc sgplot data=have2;
series x=monthyear y=sale / group=period markers;
label period="PERIOD";
run;
/*CODE 2 PRODUCES REGRESSION LINE AS EXPECTED*/
proc sgplot data=have2;
reg x=monthyear y=sale / group=period ;
label period="PERIOD";
run;
/*CODE 3 DOES NOT PRODUCES SERIES OVERLAID WITH REGRESSION LINE*/
*When I add the regression line, all the series line are all over the place;
proc sgplot data=have2;
series x=monthyear y=sale / group=period markers;* markerattrs=(color=lightgreen size=10 symbol=trianglefilled);
reg x=monthyear y=sale / group=period ;
label period="PERIOD";
run;
I saw a similar example here but it doesn't work for me, presumably because the periods do not overlap.
Below is the plot obtained from CODE 1, I just need to have the regression lines through EACH (half) series without distorting the series as CODE 3 does.
Please help, thank you!
Try forcing a sort prior to the last Sgplot and see if that helps. It did on my system (Thank you for using a set we have access to).
I an guessing that without the specified sort order that mixing Reg with series brings up some internal question about "order", which is typically the cause of that type of connections in a series plot.
proc sort data=have2; by period monthyear; run; proc sgplot data=have2; series x=monthyear y=sale / group=period markers;* markerattrs=(color=lightgreen size=10 symbol=trianglefilled); reg x=monthyear y=sale / group=period ; label period="PERIOD"; run;
Try forcing a sort prior to the last Sgplot and see if that helps. It did on my system (Thank you for using a set we have access to).
I an guessing that without the specified sort order that mixing Reg with series brings up some internal question about "order", which is typically the cause of that type of connections in a series plot.
proc sort data=have2; by period monthyear; run; proc sgplot data=have2; series x=monthyear y=sale / group=period markers;* markerattrs=(color=lightgreen size=10 symbol=trianglefilled); reg x=monthyear y=sale / group=period ; label period="PERIOD"; run;
I previously only sorted "by monthyear", sorting by "by period monthyear" does the trick. Thank you very much.
Are you ready for the spotlight? We're accepting content ideas for SAS Innovate 2025 to be held May 6-9 in Orlando, FL. The call is open until September 16. Read more here about why you should contribute and what is in it for you!
Learn how use the CAT functions in SAS to join values from multiple variables into a single value.
Find more tutorials on the SAS Users YouTube channel.
Select SAS Training centers are offering in-person courses. View upcoming courses for: