README.md

In schalkdaniel/StockSC: Pull and plot stocks

YAHOO API IS DOWN OR MOVED TO ANOTHER ADRESS! THE FUNCTIONS AREN'T WORKING ANYMORE!

StockScreener

This small package give two objects, a stocktable which is nothing else that a data.frame filled with stock data of a specific share and stocklist which is just a list of stocktable objects. The main reason for the class stocktable is the (in my opinion pretty) plot function.

The source for the stock data is yahoo finance. Any stock can be easily accessed as csv. Therefore you need the shortcut of a share and the range and paste it into the following link (here for Amazon AMZN and a range of 3 days 3d):

http://chartapi.finance.yahoo.com/instrument/1.0/AMZN/chartdata;type=quote;range=3d/csv

Example

To pull the amazon data just type in R:

Stock_AMZN = readStock( 'AMZN', '3d' )

The print generic yields the following output:

   Stock:            AMZN 
   Company:          Amazon.com, Inc. 
   Currency:         USD 
   Observed Range:   3d 

          Date   close     high     low    open volume
1   2016-09-09 780.550 780.9499 779.550 780.240  35800
2   2016-09-09 779.930 780.4200 779.480 780.420  37900
3   2016-09-09 779.170 780.4200 779.000 779.900  33900
229 2016-09-13 761.705 762.4300 761.565 761.565  49300
230 2016-09-13 761.500 762.3600 761.010 761.690  61300
231 2016-09-13 761.710 761.9899 761.311 761.311   5300


   [[ 229 lines are not showed ]] 

The plot function, which is also a generic, gives for the Amazon data the following chart:

plot( Stock_AMZN )

Why a class stocklist?

The problem after writing the stocktable class was, that I didn't know how to wrap anything around layout, which is used for the graphic, for multiple plots. Therefore I create a new class stocklist which can do multiple plots of stocktable objects.

Example

At first create a stocklist object of as many shares as we like with the command:

Stocklist <- create_stocklist( 'AMZN', 'IBM', 'TSLA', 'GOOG', stockRanges = '3d' )

With the following plot command one can create a multiple plot of the stocks:

schalkdaniel/StockSC documentation built on May 29, 2019, 3:26 p.m.