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Tag: Visualization

Visualizing a Continuous by Continuous Interaction in Linear Regression

Visualizing a Continuous by Continuous Interaction in Linear Regression

View high res version here. “Did you see if there was a difference by [insert the person’s favorite population or topic of interest].” With a resigned response I reply “No I haven’t, but that is a good idea.” I’ve had this exchange in every research talk I’ve given. Often times we are interested in understanding how one group varies by another when predicting an outcome. This can be examined via an interaction term in a regression model. An interaction term…

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Visualizing Body Mass Index by Percent of the Federal Poverty Level

Visualizing Body Mass Index by Percent of the Federal Poverty Level

View high res version here. It is often assumed that low-income populations have worse health outcomes. This is correct for many health outcomes, but for one, it isn’t as clear: Body Mass Index (BMI). BMI doesn’t show a clear association with income. Given that we are in the midst of an obesity epidemic, and BMI is the primary measurement of obesity, this is quite interesting. I wanted to take a look at some recent data to visualize the association. I created…

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District on Fire: Arson in DC from 2012-2016

District on Fire: Arson in DC from 2012-2016

  I was listening to the news and they mentioned a house fire that was likely arson. I wondered how often arson occurs in DC. I felt like it has to be somewhat rare, but I really had no idea. Luckily, Open Data DC has crime data, including cases of arson in the district by Ward. Arson is defined in DC as (take a deep breath): “The malicious burning or attempt to burn any dwelling, house, barn, or stable adjoining…

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Land of Plenty? State and Regional Variation in Food Insecurity, 2002-2016

Land of Plenty? State and Regional Variation in Food Insecurity, 2002-2016

  Food insecure households experience disruptions in the quality and quantity of the household food supply due to a lack of resources. Translation: food insecure households struggle to afford the food they need to feed their family. I’ve been thinking about state and regional variation in the U.S. For most issues, we can imagine that they will vary by state and region. Oftentimes, however, national level estimates get the limelight. For example, unemployment, poverty, and rates of HIV infection. And…

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