posted Dec 7, 2016, 8:03 AM by Rodney Dyer   [ updated Dec 7, 2016, 10:01 AM ]

A component of Applied Environmental Statistics this year was the creation of a video describing a moderately complex data set.  This project was supported in part by the experts at the ALT Lab as well as by the donation of data sets from laboratories in Life Science and Biology.

Advanced R

posted Dec 5, 2016, 10:07 AM by Rodney Dyer

Here is the script we went over.

ALT Lab Open Hours

posted Nov 29, 2016, 8:54 AM by Rodney Dyer   [ updated Nov 29, 2016, 10:13 AM ]

The ALT Lab will be open for ALT LAB POP-UP EDIT LAB HOURS on Monday the 5th and Tuesday the 6th from 2pm-5pm. If you need some assistance completing your projects take advantage of these last times. The location of the pop-up edit lab is that open space in the 4102 suite.

Updating R

posted Nov 28, 2016, 9:18 AM by Rodney Dyer

Here is a short writeup on how to update R while not loosing all your packages.

R & RStudio Conference

posted Nov 28, 2016, 8:59 AM by Rodney Dyer

There is an R and RStudio conference being offered January 11-14 in Kissimmee Florida.

Learn to write better shiny applications | Understand the new capabilities of the R Markdown authoring framework | Apply R to big data and Spark | Explore the “tidyverse” of tools for data science | Discover best practices and tips for coding with RStudio | Investigate enterprise scale development and deployment practices and tools – including the new RStudio Connect

Free-Day Ramblings

posted Nov 23, 2016, 1:37 PM by Rodney Dyer

On the Wednesday before turkey-day, we met (and when I say we, I mean the five of us), and talked about some quantitative techniques beyond that discussed in this course.  They included:
  1. Scraping data from websites
  2. Dealing with spatial components, mapping, points, lines, polygons, and rasters
  3. Function writing
  4. Dealing with loops.
Attached below is the example code for scraping water data from USGS we used as an example.

Summary Stats!

posted Nov 7, 2016, 6:30 AM by Rodney Dyer

The Power of Data

posted Oct 12, 2016, 3:50 AM by Rodney Dyer


posted Sep 28, 2016, 7:15 AM by Rodney Dyer

OK, here are the group assignments and a brief synopsis of the kind of data you will need to be looking for.


Members: desaixmg, turnerde2

Correlation data consists of two numerical data types.  The underlying purpose of looking for correlations is to see if changes in one of the variables results in similar changes in other types of variables.  However, correlation does not assume a causal function.

Linear Regression

Members: stoskuske, nicholsonak

Linear regression is similar to correlation (perhaps more so than many people understand), wherein you have an independent variable (the predictor numerical value) and one or more dependent variables (the response numerical value).  A regression model is able to be quantified producing an expected relationship among predictors in how they influence the response variable.

Logistic Regression

Members: turnerl2, atillett, tassones

Logistic regression is just like linear regression except that the response variable is dichotomous (TRUE/FALSE, PRESENCE/ABSENCE, etc).


Members: lopezr5, mccullochd, baroderique

The ANalysis Of VAriance is a way to look for differences between designated treatments (e.g., factors in R).  A 1-Way anova is a way to have a single treatment (set of factors) and determine if the mean value of the response variable (a numeric variable) changes.  


Members: flanarylr, hopkinsjs, bedingersd

A 2-way anova is an extension of the 1-Way that adds another treatment variable.  In doing so, we can determine the extent to which either of the treatment types influence the mean of the response AND potential interactions between the predictor levels.

Analysis Choices

posted Sep 20, 2016, 5:55 AM by Rodney Dyer

OK, the tallies are in!

Here are the rankings

The clear winner in the "pre-conceived what the heck is this analysis" preferences.  Here are the popularity rankings:
  1. Linear Regression
  2. Correlation
  3. 1-Way ANOVA
  4. 2-Way ANOVA (tie for 4th)
  5. Logistic Regression (tie for 4th)

Unfortunately, if you look at the first image above there is a glaring error.  Namely that it did not record your name along with your preferences...  Now, it is not the time to point the finger and assign blame here (ok Dyer messed up), so we will have to have you run  your preferences again (Dyer made sure not to mess up this time).  We can do it in class on Wednesday.

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