How can I plot time series data using ggplot2 in R?

How can I plot time series data using ggplot2 in R?

You can use the ggplot2 package to create time series plots by mapping your date or time variable to the x-axis and your data values to the y-axis. Here's a basic example:

library(ggplot2)

# Sample data
data <- data.frame(
  date = as.Date('2021-01-01') + 0:9,
  value = c(10, 12, 15, 14, 18, 20, 22, 21, 25, 30)
)

# Plotting
ggplot(data, aes(x = date, y = value)) + 
  geom_line() + 
  labs(title = 'Time Series Plot', x = 'Date', y = 'Value')

What if I want to add points to the line plot?

You can add points to your line plot by using the geom_point() function. Here's how you can modify the previous example:

ggplot(data, aes(x = date, y = value)) + 
  geom_line() + 
  geom_point() + 
  labs(title = 'Time Series Plot with Points', x = 'Date', y = 'Value')

How can I customize the colors of the line and points?

You can customize the colors by adding the color aesthetic in the aes() function or by using the color argument in geom_line() and geom_point(). For example:

ggplot(data, aes(x = date, y = value)) + 
  geom_line(color = 'blue') + 
  geom_point(color = 'red') + 
  labs(title = 'Customized Time Series Plot', x = 'Date', y = 'Value')