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Introduction to the Quandl data delivery platform

Quandl is a data delivery platform that includes many free datasets. Its website is https://www.quandl.com. The following are a few programs written in R or Python to download data from the platform. The following program retrieves the latest 50 trading days' data for International Business Machine (IBM):

> library(Quandl) 
> x<- Quandl.dataset.get("WIKI/ibm", list(rows=50)) 
> head(x,2) 
        Date   Open    High     Low  Close  Volume Ex-Dividend 
1 2018-01-09 163.90 164.530 163.060 163.83 4333418           0 
2 2018-01-08 162.66 163.905 161.701 163.47 5101023           0 
  Split Ratio Adj. Open Adj. High Adj. Low Adj. Close Adj. Volume 
1           1    163.90   164.530  163.060     163.83     4333418 
2           1    162.66   163.905  161.701     163.47     5101023

Note that ...

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