Hello wise people who know more than me! This is my first post and I don't even know if I am using the correct SAS procedure for what I need.
I am using GPLOT in SAS 9.1.3 to make plots of the type y-variable*x-variable, and using INTERPOL=JOIN to connect data points with a line.
Is there a way to introduce discontinuity in the line? That is, join up data points for x values of A, B and C and join up data points for x values of D, E and F without having the line join up C and D?
In addition to Scott's suggestions, investigate the SKIPMISS option with PROC GPLOT -- for example, in the data below, the month of June has an observation, but the value for EXPENSE is missing (.) and therefore, the SKIPMISS option tells PROC GPLOT that join should "skip" over the missing value with the line. If your data does not have an observation for June (for example), then the line would be drawn from May - July -- so you might have to put a "dummy" observation into your data for SKIPMISS to work, under that scenario.