[Gretl-users] Outliers and data labeling in scatter plots
Dear gretl community,
First of all I would like to express my sincere gratitude for the gretl
project, which I like extremely. I teach a hands-on course in
econometrics and have just switched from NCSS to gretl. I would like to
ask two questions though:
1. Is there a way to label observations in a scatter plot by, for
example, country codes in order to have a visual tool at hand to
identify outliers?
2. NCSS has a "Data screening" feature that identifies outliers. I know
that gretl calculates the Mahalanobis distance, but I have a problem to
infer from its value on whether a particular observation is an outlier.
Is there a particular procedure for the identification of outliers in gretl?
As an applied economist, I have not much expertise in programming
procedures but hope to grow in it as I use gretl more often. Thank you
very much for your consideration.
Cordially,
Marcus