Website Log Analysis with R

function-------------------------------------

dplyr::mutate+ifelse+grepl

dplyr::group_by+summarise


ggplot2::date_minor_breaks
標籤 xlab(), ylab(), labs(x=,y=), ggtitle()
每一個geom_*()都有參數可設定
圖形樣式設定 theme()，可使用內建樣式
theme_gray(): 灰背景，預設樣式
theme_bw(): 黑白樣式
使用其他樣式套件
ggthemes packages Website
xkcd packages Website





Ref-------------------------------------------
dplyr

https://rstudio-pubs-static.s3.amazonaws.com/116317_e6922e81e72e4e3f83995485ce686c14.html#/9
datetime format in R

https://www.stat.berkeley.edu/~s133/dates.html
ggplot2

http://ggplot2.tidyverse.org/reference/scale_date.html

https://github.com/yijutseng/CGMH_R/blob/master/03Visualization.md
Visualization

https://blog.hubspot.com/marketing/data-visualization-choosing-chart

https://cdn2.hubspot.net/hub/53/file-863940581-pdf/Data_Visualization_101_How_to_Design_Charts_and_Graphs.pdf