monitor_isEmpty

This function returns true under the following conditions:<ul>
<li>no time series: <code>ncol(monitor$data) == 1</code></li>
<li>no time series records: <code>nrow(monitor$data) == 0</code></li>
<li>all timeseries values are <code>NA</code></li>
</ul>This makes for more readable code in functions that need to test for this.

Utilities for working with hourly air quality monitoring data
with a focus on small particulates (PM2.5). A compact data model is
structured as a list with two dataframes. A 'meta' dataframe contains
spatial and measuring device metadata associated with deployments at known
locations. A 'data' dataframe contains a 'datetime' column followed by
columns of measurements associated with each "device-deployment".
Algorithms to calculate NowCast and the associated Air Quality Index (AQI)
are defined at the US Environmental Projection Agency AirNow program:
<https://document.airnow.gov/technical-assistance-document-for-the-reporting-of-daily-air-quailty.pdf>.

Jonathan Callahan

AirMonitor

Air Quality Data Analysis

Spencer Pease

Hans Martin

Rex Thompson

monitor_isEmpty function

<dl><dt>monitor</dt>
<dd>mts_monitor object</dd></dl>

Arguments

Test for an empty mts_monitor object — monitor_isEmpty

<dl>

<dt>monitor</dt>
<dd>mts_monitor object</dd>

</dl>

monitor_isEmpty: Test for an empty mts_monitor object

Description

Usage

Value

Arguments