This blog post uses a function and a script written in R that were displayed in an earlier blog post. Introduction This is the second of a series of blog posts about simple linear regression; the first was written recently on some conceptual nuances and subtleties about this model. In this blog post, I will use […]
Here is the function that I wrote for doing simple linear regression, as alluded to in my blog post about simple linear regression on log-transformed data on the decay of DDT concentration in trout in Lake Michigan. My goal was to replicate the 4 columns of the output from applying summary() to the output of lm(). […]
I learned about Lord Rayleigh’s discovery of argon in my 2nd-year analytical chemistry class while reading “Quantitative Chemical Analysis” by Daniel Harris. (William Ramsay was also responsible for this discovery.) This is one of my favourite stories in chemistry; it illustrates how diligence in measurement can lead to an elegant and surprising discovery. I find […]
What’s the Scatter? A scatter plot displays the values of 2 variables for a set of data, and it is a very useful way to visualize data during exploratory data analysis, especially (though not exclusively) when you are interested in the relationship between a predictor variable and a target variable. Sometimes, such data come with categorical […]
Useful Resources to Learn about R on the Internet When I program in R and struggle with something, the first thing that I usually turn to is Google. I search the relevant function or the desired outcome, and I often find the solutions within the first few hits. They likely show up in the documentation, […]
The Structure of an Atom An atom consists of a nucleus at the centre and electrons moving around it. The nucleus contains a mixture of protons and neutrons. For most purposes in chemistry, the two most important properties about these 3 types of particles are their masses and charges. In terms of charge, protons are […]
