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robertzk /
Last active July 31, 2017 20:02
Lunch & Learn 07/30/17: R environments
env <- new.env()

d <- 1
fn <- function(a, b) {
  a + b + d

fn2 <- (function() {
  d <- 2
robertzk /
Last active April 7, 2016 16:20
R-Python itertools rosetta stone

A translation of Python's itertools to R.

count(10) # 10 11 12 13 14 ...
count <- function(x, step = 1) {
  function() { (x <<- x + step) }
robertzk / capture_stack_trace.R
Created January 19, 2016 23:30
Capture an R stack trace
capture_calls <- function(e) {
e$calls <- sys.calls()
fn <- function(x) {
call_another_function(x + 1)
call_another_function <- function(y) {
robertzk / example_fn_aliasing.R
Created January 16, 2016 00:36
Example of function aliasing
for (i in 1:10) {
assign(paste0("fn", i), eval(bquote(function(x) { x + .(i) })))
#' This is my function.
#' This does stuff.
#' @param x
#' @return foo.
robertzk / error_handling.R
Created November 2, 2015 23:11
Capture error handling in R
ref_filename <- function(ref) {
attr(ref, "srcfile")$filename
frame_text <- function(frame) {
if (identical(frame, .GlobalEnv)) {
structure(pkg = "_global",
"global environment"
robertzk / s3subset.R
Created September 2, 2015 22:31
S3 subsetting overloading
wrapped <- function(obj) {
structure(obj, class = "wrapped")
`[[.wrapped` <- function(obj, x) {
if (x == "predict") {
.subset2(obj, x)
} else {
.subset2(obj, "model")[[x]]
robertzk /
Last active September 28, 2017 21:36
Help with setting up Github PAT token

Ensure you have a Github account. Next, visit the Github help page to set up your Github auth token.

Make sure git is installed. Open up your terminal, and ensure git is installed by running which git (if you do not see git not found, then you have to do nothing). If you do not have git, run brew install git. Next, configure your git identity.

Finally, copy the authenatication token you obtained earlier, and then run the following line from your terminal (with the token replaced by your token):

echo "export GITHUB_PAT=c1e2feed3242cfa0ab2e560ce4f380f66c6e9547" >> ~/.bash_profile && source ~/.bash_profile
robertzk /
Last active August 29, 2015 14:27
Setting up your hipchat token.

Setting up your Hipchat API token

First, visit the Hipchat account API page. You will have to login with you hipchat account.

Scroll down and create your Hipchat token with the following permissions:

Create New Token

The token should appear in the list above. Copy the token, and then run the following line from your terminal (with the token replaced by your token):

robertzk / send.vim
Created July 26, 2015 14:12
vim send macro
let @s='^i! git add "$(git rev-parse --show-toplevel)"; git commit -m "^[$a"; git push -q origin `git rev-parse --abbrev-ref HEAD` &^[dd;w^M;@"^M^M^['
robertzk / Syberia-FAQ
Created May 31, 2015 15:28
Initial syberia FAQ
Can I use CSV files? What about streaming production data? So I have this SAS file...
You can use any kind of data ingest your heart desires. The built-in import stage comes with support for many common formats (link), but it is easy to add more (link).
If you wish to use your live production data, write a package and add an import adapter (link).
What is a mungebit and why are you making up words?
A mungebit is the correct mathematical abstraction for wrangling a data set in a way that you won't have to bug a software or data engineer to make it "production ready" or live in "the data pipeline." It means you can turn the 90% of time data scientists spend on data wrangling into 10%.