Senior Data Scientist, MassMutual
Lecturer, UC Berkeley MIDS
--
PhD Applied Math, Computational Story Lab, UVM
MS Applied Math, UVM
BS Math, Virginia Tech
printTable(flights.slice(0, 5)) // display the first five rows
data['flights-10k.json'].url
flights.filter(flight => flight.delay < 0).sort((a, b) => a.delay - b.delay)
new Set(flights.map(f => f.origin))
_.orderBy(flights.filter(flight => flight.origin === 'SJC' || flight.destination === 'SJC'),
['origin', 'destination'], ['asc', 'desc'])
{
const regexp = /DAL|HOU/; // new RegExp('DAL|HOU')
return flights.filter(flight => flight.origin.match(regexp))
}
{
const airports = ['DAL', 'HOU'];
return flights.filter(flight => airports.indexOf(flight.origin) !== -1);
}
d3.extent(flights.map(f => f.date))
flights
.filter((flight) => flight.date >= new Date("2001-03-01"))
.sort((a, b) => a.date - b.date)
flights
.filter(
(flight) =>
flight.date >= new Date("2001-01-01") &&
flight.date < new Date("2001-02-01")
)
.sort((a, b) => a.date - b.date)
{
const keepCols = ['origin', 'destination'];
const selectedData = flights.map(obj => {
let tmpObj = {};
selectColsByName(tmpObj, obj, keepCols);
return tmpObj;
});
return selectedData
}
{
const keepCols = /de/;
const selectedData = flights.map(obj => {
let tmpObj = {};
selectColsByRegExp(tmpObj, obj, new RegExp(keepCols));
return tmpObj;
});
return selectedData;
}
flights = (await data['flights-10k.json']()).map(f => ({ ...f, date: new Date(f.date) }))
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