Articles by Francis Smart

A Sudoku Puzzle Solver – attempt 1

July 9, 2013 | Francis Smart

I have programmed up a R based Sudoku problem solver for Sudoku puzzles of that only require simple inference.  In these puzzles a solution can be found using only first order inference.  This solver can be found at the end of the code locate... [Read more...]

Optimal Pricing for a Simple Monopolist

July 5, 2013 | Francis Smart

# A single price monopolist is a monopolist because it is the only supplier of a particular product. The monopolist therefore has the power to choose a price to sell the product at. # Those who have a willingness to pay which is greater than the ... [Read more...]

Sudoku Automation Solver Challenge – R

June 14, 2013 | Francis Smart

On a recent flight I was bored waiting for the plane to land and I tried out the electronic sudoku game that they had offered.  I found the game surprisingly interesting as I realized that it is far more entertaining when you cannot use paper or p... [Read more...]

More explorations of Shiny

June 11, 2013 | Francis Smart

I have continued to explore the functionality of the Shiny package released by the Rstudio team and I have been increasingly impressed.  The code fits together very clean and easy to manipulate or add to.  If you have some knowledge of html o... [Read more...]

Bulk search for domain names using R

June 8, 2013 | Francis Smart

# There are several domain name servers that allow # for bulk searching of domain names.# However, they do not provide any wildcard support # and instead exp... [Read more...]

A Shiny App Goes Viral

June 7, 2013 | Francis Smart

I am not sure how many of you have seen this Business Insider article.  It is basically about a shiny app created by Joshua Katz as NC State.  It is really fun playing with shiny app.With nearly a million facebook likes this web app buil... [Read more...]

Running R Scripts Directly From Dropbox

June 5, 2013 | Francis Smart

I have written a little function that allows users to run R scripts out of Dropbox directly from any location.  It was aided by this post on biobucket.  The reason I am particularly interested in this feature is because I am often using a ser... [Read more...]

Are Fox News Polls Biased?

May 29, 2013 | Francis Smart

Especially after the outcome of the mid-term election, I think there is a common contention among some groups that there is something wonky about Fox News when it comes to reporting polls relative to President Obama and the Democratic Party in general.... [Read more...]

Item Analysis App – Shiny Code

May 28, 2013 | Francis Smart

Here is the code for my first Shiny App! It is the one that I posted previously with a few slight revisions. You can see it at:A Shiny R AppIn order to make any sense of this I suggest you working through the tutorial ( ... [Read more...]

Shiny + Concerto = YES !!!

May 23, 2013 | Francis Smart

So I have finally gotten beta access to the two most powerful R controlled web application makers in existence and produced very exciting experimental productsA few posts ago I posted a Visual Reasoning Test that I had made by hand and powered wit... [Read more...]

My Prime Sieve – Homage to Yitan Zhang

May 22, 2013 | Francis Smart

# As a homage to Yitang Zhang who has proven a mind-bending property of Prime Pairs, I have written a prime Sieve to detect all of the prime numbers from 1 to N. # There might very well be a function in the base package that already does this. No... [Read more...]

Non-Verbal Reasoning Test – Concerto

May 20, 2013 | Francis Smart

I have just released my first complete test of non-verbal problem solving skills.  It is run on Concerto (an R-based application development platform targeted at primarily test developers)  Try it out by following the link below.Non-Verbal Re... [Read more...]

Spatial Critter Swarming Simulation

May 10, 2013 | Francis Smart

# I am interested in how small bits of individualized instructions can create collective action.# In this simulation I will give a single instruction to each individual in the swarm.# Choose another individual who is not too close, then accelerate towards that individual.# I also control momentum causing the previous movement ... [Read more...]

Why Blog?

May 2, 2013 | Francis Smart

The Blog Review ProcessA series of events in my life have lead me to reconsider the value of blogging.The Back StoryShort story: I got fired.Long story: Recently I was hired to write occasional blog posts for Quandl. They probably figured that due to m... [Read more...]
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