My family and I love boardgames.  We are also on the lookout for new ones that would fit with the ones we already like to play.  So I decided to create a boardgame recommendation websitehttps://larrydag.shinyapps.io/boardgame_reco/I built it using R.  The recommendation engine uses a ... [Read more...]

This is a great time to have tools to do data analysis.  Microsoft is now allowing evaluations of its new SQL Server.  This new SQL Server can now be deployed to a Linux OS environment.  This is big news especially for those that have followed this blog through the years.... [Read more...]

Microsoft has been really increasing their development of tools in the predictive analytics and machine learning space.  Another such tool they released recently is LightGBM.  From the Github site...LightGBM is a fast, distributed, high performance gradient boosting (GBDT, GBRT, GBM or MART) framework based on decision tree algorithms, used ... [Read more...]

Statistical Analysis and Data Mining are considered the hottest skills on LinkedIn for 2014.  According to their report from analyzing jobs and recruiters on the LinkedIn website.  I would say its safe to say that it will continue to be ... [Read more...]

I was inspired by this blog post and thought I could do the same thing in R.  Well I posted the code in Google+Here are my results.  Not bad. [Read more...]

Well it has a been a long time since I have written anything on this blog.  I am long overdue.  I've been terribly busy learning new things and getting on with life.  One of the things I have learned is building R applications using Shin... [Read more...]

A great interview on the Simply Statistics blog with Google's Nick Chamandy, Phd in Statistics.  Explains that he mainly uses R among other tools to perform his work at Google.  Also of note is the active data science community within Google ... [Read more...]

No doubt those that read my blog know that the tools I use to do my Industrial Engineering and Operations Research work heavily rely on the open source side of software.  That is why I try to support as many open source projects such as COIN-OR, G... [Read more...]

According to recent news (dallasnews.com) there is a new release of a public national database for wrongful convictions.  There are plenty of details in the public list including Age, Race, and how the conviction was overturned.  According to... [Read more...]

Apparently former Facebook intern, Paul Butler,  graphic of the Facebook social network graph is being used for Facebook's IPO.  The social network graphic is featured on Page 7 of the IPO filing.  His graphic was featured on mashable an... [Read more...]

I came across an interesting SAS macro that was used for visualizing log odds relationships of data.  This type of chart is helpful for visualizing the relationship between a binary dependent variable and a continuous independent variable.  I... [Read more...]

Recently I was working on a data visualization project.  I wanted to visualize summary statistics by category of the data.  Specifically I wanted to see a simple dispersion of data with confidence intervals for each category of data. R i... [Read more...]

I was reading an article from Datamation on 70 Open Source Replacements for Small Business when I noticed a glaring omission.  Where are the software applications for Operations Research and Analytics?  So here is my best addendum to this art... [Read more...]

I'm a big fan of the Google Summer of Code.  It brings great projects together with a learning opportunity for students.  Once again the R Project was selected to be part of the Google Summer of Code in 2011.  Some other notable mathemat... [Read more...]

I wanted to write a blog post about the advancements of Natural Language Processing in light of the performance of IBM's Watson on the Jeopardy challenge last week.  Natural Language Processing is the science of transforming and interpreting human... [Read more...]

The Joy of Stats narrated by Hans Rosling was just produced by BBC and shown to their audience.  Hans Rosling via gapminder.org was kind enough to post the full hour video of the documentary about joys of statistics.  The video is posted on Y... [Read more...]

O'Reilly Media has been a big advocate of Open Data and believes that is where a lot of computing is going to be headed in the future.  I think they are definitely on to something.  Yet the future could be now.  There is a lot of opportu... [Read more...]

Recently I've been doing a lot of work with predictive models using logistic regression.  Logistic regression is great for determing probable outcomes of a independent binary target variable.  R is a great tool for accomplishing this task.&nb... [Read more...]

The results of 2010 INFORMS data mining competition just recently finished.  The leaders were presented at the 2010 Annual INFORMS Conference.  The 2010 INFORMS data mining competition goal was to determine short term movements in stock price... [Read more...]

The Dallas R User Group had a meeting over the weekend.  One of the discussions is the memory limitations with R.  This is a common subject among the R community and R User Groups.  There has been a lot of strides recently in allowing R ... [Read more...]