Shuffling and Splitting Operations

Shuffling is a pretty interesting operation in several scenarios. And different languages / platforms have  interesting features using the shuffling  operation.

Examples:

• Shuffle the contents of a C# List
• Select random lines from file  (using ‘shuf’ command in Linux)

References:

• C#
  • https://en.wikipedia.org/wiki/Fisher%E2%80%93Yates_shuffle
  • http://stackoverflow.com/questions/273313/randomize-a-listt
  • http://www.dotnetperls.com/shuffle
• Linux
  • http://unix.stackexchange.com/questions/108581/how-to-randomly-sample-a-subset-of-a-file
  • shuf command:
    • shuf -n 500000 ydata-fp-td-clicks-v1_0.20090501 -o 20090501/sample_500K
  • split command
    • http://askubuntu.com/questions/54579/how-to-split-larger-files-into-smaller-parts
• Pandas:
  • pandas has a ‘sample’ function that can be very useful to randomly sample rows from a pandas dataframe.
  • http://pandas.pydata.org/pandas-docs/version/0.17.0/generated/pandas.DataFrame.sample.html

Code:

DecisionController

Advertisements