## Not run:
# plosviews('10.1371/journal.pone.0002154', 'id', 'alltime')
# plosviews('10.1371/journal.pone.0002154', 'id', 'last30')
# plosviews('10.1371/journal.pone.0002154', 'id', 'alltime,last30')
# plosviews(search='marine ecology', byfield='subject', limit=50)
# plosviews(search='evolution', views = 'alltime', limit = 99)
# plosviews('bird', views = 'alltime', limit = 99)
# ## End(Not run)
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