A fancy stock chart

It's time to bring together what you have learned so far to create a chart that could go onto a publication.

In this exercise, you will plot Microsoft and Citigroup stock prices on the same chart. You are provided with the same dataset, data, as before.

แบบฝึกหัดนี้เป็นส่วนหนึ่งของหลักสูตร

Visualizing Time Series Data in R

Plot the "microsoft" series in data and add the title "Dividend date and amount"
Without creating a new plot, add the "citigroup" series to the plot, and make its line "orange" and twice as thick as the default width
Add an appropriately scaled Y axis on the right side of the chart for the "citigroup" data using axis() and pretty(), and make it orange

ลองทำแบบฝึกหัดนี้โดยเติมโค้ดตัวอย่างนี้ให้สมบูรณ์

# Plot the microsoft series


# Add the citigroup series


# Add a new y axis for the citigroup series