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Stock trading with neural networks evolved by a genetic algorithm

on Fri, 04/01/2016 - 23:17

- Very preliminary experimentation, done in 2012
- Tools used: Ruby and GnuPlot

Participation in conferences:

Ruby tools and perks

on Fri, 02/19/2016 - 13:38

A list of ruby tools and tips to make life easier and more efficient:


This is a list of external links related to machine learning and data science which could be useful.



Facebook Shares Large Data Sets to Help Improve its AI and Data Science Algorithms (automatic text understanding and reasoning):




Counting the number of occurrences of a string in a file

on Fri, 07/18/2014 - 15:32
Let's assume you want to find the number of ocurrences of a string in a big XML file, quickly.
Let the filename be 'properties.xml', the keyword string be '<property>', and the script language be Perl. Then, the following command will print the total number of occurrences: 
perl -lnwe '$a+=()=/\Q<property>/g; }{ print $a;'  properties.xml