PurpleAirSoH_dailyToIndex_00: Daily state of health index

In AirSensor: Process and Display Data from Air Quality Sensors

Description

This function calculates a multi-metric index based on the data in SoH dataframe passed in. A tibble is returned containing a state of health index for each day. The returned tibble contains columns: datetime, index, and index_bin.

The index column contains a value normalized between 0 and 1 where 0 represents low confidence in the sensor data and 1 represents high confidence. The index_bin is one of 1, 2, or 3 and represents poor, fair, and good data respectively.

The index is calculated in the following manner:

1. If the A or B channel percent reporting is < minPctReporting, index = 0

2. Otherwise, index = pm25_A_pm25_B_rsquared

The breaks are used to convert index into the indenx_bin poor-fair-good values.

Usage

PurpleAirSoH_dailyToIndex_00(
  SoH = NULL,
  minPctReporting = 50,
  breaks = c(0, 0.2, 0.8, 1)
)

Arguments

SoH	PurpleAir daily State-of-Health dataframe.
minPctReporting	Percent reporting threshold for A and B channels.
breaks	Breaks used to convert index values into index bins.

Examples

 

library(AirSensor)

tbl <- 
  example_pat_failure_A %>%
  pat_dailySoH() %>%
  PurpleAirSoH_dailyToIndex_00() 
  
head(tbl)

AirSensor documentation built on March 13, 2021, 1:07 a.m.