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Predicting OS market share with Markov chains- A review of past predictions

Predictions from Markov Chains were highly accurate

Back in 2011 I fielded a survey to fortune 500 companies.  Among other questions I asked what current OS they were using and what they thought they would be using next year.   From those simple (to answer) two questions, I was able to build Markov Chains showing the estimated switching patterns.  Many of my client’s did not believe what the results showed however history has proven them to be far more accurate than I would have imagined!

Yes, Linux never really ballooned up but the Windows predictions were highly accurate.

Markov Chains
Here’s a great book to get ideas on conveying data visually

Similarities in payment distributions by Industry

Payment Distributions

In 2010 a national study across various industries examined payment distributions by industry.  The below additive tree shows the correlations  by Industry.  When reading an additive tree, follow the path from between the lines.  The shorter the distance, the higher correlated they are.  Color-coding was done to aide interpretation of the tree and is subjective.  I used SYSTAT to create tree.

In reviewing the tree below you can see that, overall, there are two main branches that split at the root.  After that, there are some pretty clear patterns.


Similarities in payment distributions by Industry by industries

Here’s a great book to get ideas on conveying data visually

Here’s a great book to get ideas on conveying data visually

And here is a book utilizing SYSTAT by one of the programmers. I learned the vast majority of my statistics from this great book!

Automate Excel graphs with AutoHotKey and SPSS; Automating pretty charts!

Automate Excel graphsAfter 20 years of doing multivariate statistics, doing analytics is very quick and easy for me.  Putting together the report which clients will think is “pretty” and convey the results is what really takes the time!  I have a ton of macros in SPSS which greatly simplify the front-end however I’ve always preferred Excel graphs to SPSS (because they don’t look like they were drawn with crayons).

Automate Excel graphs

In the below video I demonstrate how you how you can use AutoHotKey to easily automate Excel graphs that you’ll be proud to put your name on!

Preferred payment types by Industry- Guess I won’t write a check at McD’s

A national study of various industries in 2010 led to some interesting findings for our client in the finance industry.  The below chart displays the preferred payment types by industry by industry.  Given how “cashless” our society has become, it would be very interesting to see how much of a shift from Cash to Credit/Debit cards has occurred.  And does anybody actually write checks anymore?  I keep one in my wallet for “just in case” scenarios but I often go a year or so without using it.

Preferred payment types by Industry

Preferred payment types by Industry

Here’s a great book to get ideas on conveying data visually