Publications by Scott Stoltzman
Seinfeld Characters – A Post About Nothing
This post is dedicated to my mother – Seinfeld’s greatest fan. Seinfeld is a classic TV sitcom. It featured four main characters surrounded by relatively normal, everyday, run of the mill scenarios. In the spirit of Seinfeld, this post will also “be about nothing.” Load Required Libraries library(scales) library(RMySQL) library(string...
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Price Volatility – Basic Brownian Motion
The Situation You are a consultant who has been hired by a business that sells one commodity product. On December 31st the price is $100 per unit. The business owner wants to know what to expect by the end of January. Your client gave you the message: Prices are based off the the sales the previous day Roughly 95% of the time, the price will b...
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Price Volatility – Basic Brownian Motion
The Situation You are a consultant who has been hired by a business that sells one commodity product. On December 31st the price is $100 per unit. The business owner wants to know what to expect by the end of January. Your client gave you the message: Prices are based off the the sales the previous day Roughly 95% of the time, the price will be ...
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City of Fort Collins Spending Analysis
Stoltzmaniac is going local in today’s blog post! I dug into the City of Fort Collins open data and published my findings below. The data was surprisingly clean and laid out in JSON format on Amazon S3. This post shows my exploration of the data along with some observations. As always, I loaded the required libraries. I also loaded a custom �...
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Random Forest Classification of Mushrooms
There is a plethora of classification algorithms available to people who have a bit of coding experience and a set of data. A common machine learning method is the random forest, which is a good place to start. This is a use case in R of the randomForest package used on a data set from UCI’s Machine Learning Data Repository. Are These Mushroo...
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Data Visualization – Part 1
Introduction to Data Visualization – Theory, R & ggplot2 The topic of data visualization is very popular in the data science community. The market size for visualization products is valued at $4 Billion and is projected to reach $7 Billion by the end of 2022 according to Mordor Intelligence. While we have seen amazing advances in the technolog...
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Data Visualization – Part 2
A Quick Overview of the ggplot2 Package in R While it will be important to focus on theory, I want to explain the ggplot2 package because I will be using it throughout the rest of this series. Knowing how it works will keep the focus on the results rather than the code. It’s an incredibly powerful package and once you wrap your head around what...
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Data Visualization – Part 3
What Type of Data Visualization Do You Choose (if any)? Determining whether or not you need a visualization is step one. While it seems silly, this is probably something everyone (including myself) should be doing more often. A lot of times, it seems like a great way to showcase the amount of work you have been doing, but winds up being completel...
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Rent Prices and TrelliscopeJS
Rent Prices are Soaring in Most of Colorado Call it gentrification, supply-and-demand, call it whatever you’d like… the fact is, rent prices have gone up in Colorado in the last decade. Chip Oglesby – GitHub – did a nice analysis on the data provided by colorado.gov. Chip’s analysis can be seen here. His analysis states, “Efficiency a...
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Building a Medicare Shiny App – Part 1
Hello R community. if you’re up for some fun tinkering with a Shiny App please join me on a new project. I would love to see some collaboration in designing a Shiny Application which will help people make a decision about a healthcare provider. I have only just begun on this project but would to work with others. This is just a quick look at th...
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