# Posts

### Rethinking the logistic model

A few weeks ago I rambled on about carrying capacity as a concept. The day after I posted that, I stumbled across a paper by James …

### Mental Health Redux

About a year ago I disclosed my depression to the interwebs. It seems timely to revisit the topic.

### Introducing $\rho_{max}$ and $K_{max}$!

I often hear the phrase, “This population is below $$K$$ so …”. But what does the trajectory of such a population look like? I think it …

### EnTyrely Too Much

I’m excited to finally announce EnTyrely Too Much after an overly long gestation period. Looking at the fantastic pages put …

Metadata are good. Everyone should create metadata. But writing raw XML is bad. rOpenSci created the EML package to make this easier.

### New blog title poll!

I’d like to change the title of this blog, so I solicited suggestions on Twitter and Facebook. There were some great ones! Then I held …

### Citations for Calibration Curves

I now regularly test models using cross validation. I use a “calibration curve” to see whether the predictions from independent data …

### Geometric vs. Exponential growth models: a zombie idea

5 out of 10 ecology textbooks on my shelves make this distinction: geometric models are for populations with discrete pulses of births, …

### Mental health -- it is important

Awareness of students’ mental health is growing in academia right now. Unsurprisingly, faculty suffer mental illness too, and …

### Naming sum-to-zero contrasts

In 2016 I started thinking about using sum to zero contrasts and wrote a brief blog post about them. Someone read it! I got this email …