04-16-2018 10:49 AM
I was asked to add confidence interval in a graph, which was used to identify the average trend within subjects by group (race) over time.
My outcome here is called 'SCMOindex_reall' and I have 2021 individuals in total. The time variable refers to days since the first occurrence of certain condition. The original graph displays the individual profiles plus the average trend by race. I'm not sure if there is any option out there for adding CI in each line using proc gplot. If not, i'll be willing to use other procedure/way to generate a similar graph. You inputs and suggestions will be highly appreciated. Thank you!
proc gplot data=temp.limitaion_long_new_f; plot scMoIndex_reall*t=spid / haxis=-1800 TO 7000 by 365 vaxis=0 TO 7 by 1; plot2 scMoIndex_reall*t=race_f; symbol1 v=none repeat=2021 i=join color=cyan; symbol2 v=none i=sm50s color=blue width=3 line=1; symbol3 v=none i=sm50s color=red width=3 line=2; label t='Days since the First Occurrence of Stroke'; format race_f race.; title 'Individual Profiles with Race Subgroups'; run; quit;
04-16-2018 11:09 AM - edited 04-16-2018 11:12 AM
Without seeing your data, this is a bit of a "guestimate", but try something like this (notice the placeholder for your CI variables):
ods graphics / attrpriority=none; proc sgplot data=temp.limitaion_long_new_f; label t='Days since the First Occurrence of Stroke'; format race_f race.; title 'Individual Profiles with Race Subgroups'; xaxis values=-(1800 TO 7000 by 365); yaxis values=(0 TO 7 by 1); y2axis values=(0 TO 7 by 1); series y=scMoIndex_reall x=t / group=spid lineattrs=(color=cyan pattern=solid); series y=scMoIndex_reall x=t / group=race_f smooth lineattrs=(thicknesst=3)
y2axis name="race"; scatter y=scMoIndex_reall x=t / group=race_f markerattrs=(size=0) y2axis yerrorupper=<your upper CI var> yerrorlower=<your lower CI var>; keylegend "race"; run;
04-16-2018 11:22 AM
04-16-2018 11:25 AM
For my example, you would need to compute the CI outside of SGPLOT using the raw data, and reference the two variables in the SCATTER statement.
04-16-2018 11:44 AM
04-16-2018 11:16 AM
http://support.sas.com/documentation/cdl/en/grstatproc/62603/HTML/default/viewer.htm#a003155517.htmI... this day and age you should really have long since moved to proc sgplot/GTL, if not for your own sanity, but other programmers.
Look at this blog, has thousands of examples of all types of graphs with code:
And one of the posts shows getting CI:
However there are many ways and methods to getting confidence intervals.
As for your specific question maybe something like this:
But I am not sure which line you are talking about - that graph just looks like a mass of light blue to me??