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juliasilge/tidytext: tidytext 0.2.1

Julia Silge; David Robinson; Colin Fay; Emil Hvitfeldt; Kenneth Benoit; Kanishka; Jim Hester; Jeff Erickson; Amanda Dobbyn; Luis de Sousa; Sean Kross; Jon Calder; Tim Mastny; Seth Berry; Lionel Henry; Lincoln Mullen; James Keirstead; Erwan Le Pennec; Dave Childers; Arfon Smith; Amelia McNamara

  • Fix bug in augment() function for stm topic model.
  • Warn when tf-idf is negative, thanks to @EmilHvitfeldt (#112).
  • Switch from importing broom to importing generics, for lighter dependencies (#133).
  • Add functions for reordering factors (such as for ggplot2 bar plots) thanks to @tmastny (#110).
  • Update to tibble() where appropriate, thanks to @luisdza (#136).
  • Clarify documentation about impact of lowercase conversion on URLs (#139).
  • Change how sentiment lexicons are accessed from package (remove NRC lexicon entirely, access AFINN and Loughran lexicons via textdata package so they are no longer included in this package).

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