compress_field: Compress Field into Fewer Categories
In COMHIS/comhis: Bibliographic Data Analysis

Description Usage Arguments Details Value Author(s) References Examples

Merge the less common terms into a single group

1	compress_field(x, topn = NULL, min.freq = NULL, rest = "Other")

`x`	Vector or factor.
`topn`	Number of top entries to include; or a character vector
`min.freq`	Minimum frequency for the included groups.
`rest`	Name to be used for the remaining entries

With the min.freq argument, groups that have less items that this will be merged.

Compressed version of the input.

Leo Lahti leo.lahti@iki.fi

See citation("comhis")

  p <- compress_field(c("A", "A", "A", "B","B","C", "D"),
         topn = 2, rest = "Other")
  p <- compress_field(c("A", "A", "A", "B","B","C", "D"),
         topn = c("A", "B"), rest = "Other")