checking dependencies in R code ... NOTE
'library' or 'require' call to ‘shiny’ in package code.
Please use :: or requireNamespace() instead.
See section 'Suggested packages' in the 'Writing R Extensions' manual.
Package in Depends field not imported from: ‘ggplot2’
These packages need to be imported from (in the NAMESPACE file)
for when this namespace is loaded but not attached.
checking R code for possible problems ... NOTE
timeline: no visible global function definition for ‘ggplot’
timeline: no visible global function definition for ‘geom_segment’
timeline: no visible global function definition for ‘aes_string’
timeline: no visible global function definition for ‘geom_rect’
timeline: no visible global function definition for ‘geom_text’
timeline: no visible global function definition for ‘theme’
timeline: no visible global function definition for ‘element_blank’
timeline: no visible global function definition for ‘xlab’
timeline: no visible global function definition for ‘ylab’
timeline: no visible global function definition for ‘xlim’
timeline: no visible global function definition for
‘scale_y_continuous’
timeline: no visible global function definition for ‘geom_point’
timeline: no visible global function definition for ‘scale_color_grey’
timeline: no visible global function definition for ‘geom_hline’
