Standard accessor/replacement method for metadata contained within S4 acs-class objects.
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an acs object
an integer value to be used in replacement
currency.year will return the (integer) value of the
dollar-year of object.
Assigning a new value to currency.year (through
currency.year(object)=value) will change the value of
currency.year in the object's metadata and also modify all
dollar values of the object (as determined by
acs.units(object)=="dollars") to be in the dollars of the
desired new year.
A related function,
currency.convert provides a helper function
to create a new copy of an acs-class object with a modified
currency.year and converted dollar values without altering the
original object. When
rate="auto" (the default),
currency.convert will look up values from the
database to use in conversion. When a numeric rate is provided
through this option, actual
cpi values are ignored. When
verbose=TRUE, currency.convert will provide additional information
about the rates of conversion and the acs.colnames converted.
As of version 2.0 the package includes CPI data from 1913 through 2015, allowing conversion of dollar values for any years in this range.
Returns (or replaces) an integer value from the "currency.year" slot of an object.
Ezra Haber Glenn [email protected]
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