Add trendline and confidence interval of linear or nonlinear regression model and
show equation to 'ggplot' as simple as possible. For a general overview of the methods used in
this package, see Ritz and Streibig (2008) and
Greenwell and Schubert Kabban (2014) .
Authors:
Weiping Mei [aut, cre, cph]
,
Guangchuang Yu [aut]
,
Brandon M. Greenwell [aut]
,
Jiangshan Lai [ctb]
,
Zhendu Mao [ctb]
,
Yu Umezawa [ctb]
,
Jun Zeng [ctb]
,
Jun Wang [ctb]