I would like to know how I can assign a name to a name.  I have a
dataset that has different years in it.  I am writing scripts using R
and I would like to give a month a generic name and then use the generic
name to do different analysis.  The reason for the generic name would be
so that I only have to change one thing if I wanted to change the year.
For example.
Year1 = 1999
datayear <- subset(dataset, Year = Year1)
I would want  to subset for whatever year is in "Year1".  I am not sure
if R does this but it would be great if it does.  Is there also anyway
for R to ask the user for the variable in the console without going into
the script and then use whatever the user puts in. Thanks for the help.

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