JellisHeRo

`R` Spatial Analysis Notes

sp - defines the set of base classes for spatial data in R. Most useful for creating, converting, merging, transforming (e.g. projection), and plotting (see spplot) Spatial* objects.
rgdal - wrapper

What follows is a technical test for this job offer at CARTO: https://boards.greenhouse.io/cartodb/jobs/705852#.WSvORxOGPUI

Build the following and make it run as fast as you possibly can using Python 3 (vanilla). The faster it runs, the more you will impress us!

Your code should:

Download this ~2GB file: https://s3.amazonaws.com/carto-1000x/data/yellow_tripdata_2016-01.csv
Count the lines in the file
Calculate the average value of the tip_amount field.

This is a collection of information on PostgreSQL and PostGIS for what I tend to use most often.

	# devtools::install_github("hrbrmstr/vegalite")
	library(vegalite)
	library(htmltools)

	dat <- jsonlite::fromJSON('[
	{"a": "A","b": 28}, {"a": "B","b": 55}, {"a": "C","b": 43},
	{"a": "D","b": 91}, {"a": "E","b": 81}, {"a": "F","b": 53},
	{"a": "G","b": 19}, {"a": "H","b": 87}, {"a": "I","b": 52}
	]')