Learning Path: How to Use Nmap and Zenmap
Objective I needed to learn how to use the Nmap and Zenmap tools for devices connected to my network. The first video below is by far the one I would consider to be the most valuable. The others had good…
Mitch
Subsetting and Filtering a Data Frame in R (base R)
When I was first learning R in a Coursera course from Johns Hopkins University, subsetting and filtering was one of the first things I learned how to do in R. Subsetting is essentially scaling down your data frame so that…
What is a Data Frame in R?
I use data frames nearly every time I write a script in R. I’m usually reading and storing the contents of several CSV files to process its contents. The more you work in R, the more you are likely to…
How to add a new column to a data frame in R
One of the first things I struggled with when learning to write R code, was how to add a new column to a data frame in R. For example, we have a data frame, userdata, with the following three columns…
What is a Data Warehouse?
A data warehouse, distilled to its simplest form, is a database that contains different tables of data that do not change over time. Query and dashboarding tools can be placed on top of the data warehouse to help the business…
