stockVis Pitch

Peer Assessment
Developing Data Product
Coursera Data Science Specialization

• The stockVis looks up stock prices by ticker symbol and displays the results as a line chart.

• The stockVis relies heavily on two functions from the quantmod package:

  • It uses getSymbols to download financial data straight into R from websites like Yahoo finance and the Federal Reserve Bank of St. Louis.
  • It uses chartSeries to display prices in an attractive chart.

• The stockVis lets you:

  • Select a stock to examine.(By default, stockVis displays the SPY ticker (an index of the entire S & P 500). To look up a different stock, type in a stock symbol that Yahoo finance will recognize. You can find a list of Yahoo's stock symbols here. Some common symbols are GOOG (Google), AAPL (Apple), and GS (Goldman Sachs).)
  • Pick a range of dates to review.
  • Choose whether to plot stock prices or the log of the stock prices on the y axis, and
  • Decide whether or not to correct prices for inflation.

Suppose you want to look up the recent stock prices of Microsoft.

• Step 1: Go to Yahoo Finance.

• Step 2: Find the stock symbol of Microsoft by searching Microsoft. (You can find it's MSFT.)

• Setp 3: Type MSFT in the textbox.

• Step 4: Pick a range of dates you want to review and click Get Stock.

• Step 5: Choose whether to plot the log of stock prices.

• Step 6: Choose whether to adjust for inflation.

You will see the stock prices as a line chart on the right!

Thank you for your attention!

Please enjoy the stockVis!

Jingjing Chen
Aug 19 2014