R Script to create a heatmap the visualizes Google Analytics sessions by day of week and hour of the day. Tutorial: http://www.ryanpraski.com/r-heatmap-tutorial-for-google-analytics/

heatmap_sessions_by_hour_by_day_of_week_google_analytics_R.R

library(googleAnalyticsR)
library(ggplot2)

#Authorized Google Analytics R- this will open a webpage
#You must be logged into your Google Analytics account on your web browser
ga_auth()

#Make sure to replace this with your viewId. You can use google_analytics_account_list() to find your viewId. 
my_id <- 94579701

#Session by Hour of Day and Day of Week Query
df1 <- google_analytics_4(my_id, 
                          date_range = c("365daysAgo", "yesterday"),
                          metrics = c("sessions"),
                          dimensions = c("dayOfWeek","hour"),
                          anti_sample = TRUE)

#heatmap ggplot
df1 %>%
  ggplot(aes(x=dayOfWeek, y=hour, fill=sessions)) + 
  geom_tile() + 
  scale_fill_continuous(low = 'white', high = 'red')