purpleairDownload: Download Purple Air PM2.5 data

In jianzhaobi/bjzresc: Jianzhao's Research-Related Functions

Description

Download Purple Air PM2.5 data and save as csv files (each PurpleAir site per file). The indoor sites are not included by default.

Usage

purpleairDownload(site.csv, start.date, end.date, output.path, average,
  time.zone = "GMT", indoor = T, n.thread = 1)

Arguments

site.csv	a data frame of a site list or a absolute path to the site CSV file (from getPurpleairLst).
start.date	the beginning date in the format "YYYY-MM-DD".
end.date	the end date in the format "YYYY-MM-DD".
output.path	the path to output CSV files.
average	get average of this many minutes, valid values: 10, 15, 20, 30, 60, 240, 720, 1440, "daily". "daily" is not recommended as the daily values can only be calculated at the UTC time.
time.zone	time zone specification to be used for the conversion, but "" is the current time zone, and "GMT" is UTC (Universal Time, Coordinated). Invalid values are most commonly treated as UTC, on some platforms with a warning. For more time zones, see https://www.mathworks.com/help/thingspeak/time-zones-reference.html.
indoor	whether includes indoor sites (TRUE by default).
n.thread	number of parallel threads used to download the data (1 by default).

Examples

purpleairDownload(site.csv = '/absolute/path/to/the/sensorlist.csv',
    start.date = '2017-01-01',
    end.date = '2017-12-31',
    output.path = '/output_path',
    average = 60,
    time.zone = 'America/Los_Angeles')

jianzhaobi/bjzresc documentation built on Feb. 14, 2021, 7:45 a.m.