How to show data points in longitudinal data plots?

[jeniffer_jacob]

I am trying to show the data points for the longitudinal data plots. 

proc sgplot data=test_series;
series y=glucose x=time /group=subject;
xaxis values=(0, 6, 12, 24);
run;

I can only generate the following plots (first plot) using the above code.

I tried 

symbol interpol=join   value=dot;   

and it is not working. 

The second plot showed an example of data points. I only need black dots for my plots. 

Any suggestions? 

Thank you so much!

[PaigeMiller]

---

@jeniffer_jacob wrote:

I am trying to show the data points for the longitudinal data plots. 

proc sgplot data=test_series;
series y=glucose x=time /group=subject;
xaxis values=(0, 6, 12, 24);
run;

I can only generate the following plots (first plot) using the above code.

I tried 

symbol interpol=join   value=dot;   

and it is not working. 

The second plot showed an example of data points. I only need black dots for my plots. 

---

The SYMBOL command only works on old style graphics procedures, such as PROC GPLOT. It does not work in PROC SGPLOT.

You can add dots for the markers on the SGPLOT by adding the MARKERS option to the SCATTER statement, along with any or all of the options MARKERATTRS= MARKERFILLATTRS= MARKEROUTLINEATTRS= as described in the documentation at https://documentation.sas.com/?docsetId=grstatproc&docsetTarget=n1jkqnmk6y6ms9n1b2vvubyzqd4a.htm&doc...

[jeniffer_jacob · Accepted solution]

Thank you so much for your kind reply. 

But markerattrs doesn't work with series statement. 

proc sgplot data=test_series;
series y=glucose x=time /group=subject;
xaxis values=(0, 6, 12, 24);
markerattrs=(symbol=circlefilled size=25
color=black);
run;

Markerattrs does work with scatter statement. But how can I connect the data points if I use scatter statement with markerattrs?

proc sgplot data=test_series;
scatter x=time y=glucose / filledoutlinedmarkers
markeroutlineattrs=(color=red thickness=2)
markerattrs=(symbol=circlefilled size=25
color=black);
run;

Any other suggestions?

Thank you so much!

[jeniffer_jacob]

I figured it out! Markerattrs needs markers in front of it for series statement. 

Thanks again for your help!