Nick Kennedy

Nick Kennedy has asked 9 questions and find answers to 69 problems.

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About

I'm a doctor and researcher with an interest in inflammatory bowel disease. I make extensive use of R (plus a smattering of other languages as appropriate).

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Nick Kennedy questions

Animation in PDFs using knitr that supports more than just Adobe Reader
What's the preferred means for defining an S3 method in an R package without introducing a dependency?
Extending dplyr and use of internal functions
How to use S3 methods from another package which uses export rather than S3method in its namespace without using Depends or library()
Calculating the analogue of Euler angles/Tait-Bryan angles for dimensions >3

Nick Kennedy answers

Can I override `$` or `[[` to throw an error instead of NULL when asking for a missing list element?
How do you know RStudio is running?
How to pass an expression "from higher level" to mutate?
Animation in PDFs using knitr that supports more than just Adobe Reader
Define plot elements size in mm (R)
Identify if in parallel call
Is there a way to mimic R's higher order (binary) function shorthand syntax within spark or pyspark?
how do function observe() and reactiveValues() work?
Changing the color of the sliderInput in Shiny walkthrough
Use values from 2 matrices to index a third in R