Safely return ratios values

Computes a ratio and returns either the calculated value or a QA/QC flag if the ratio cannot be computed.

Usage

get_ratios(val1, val2)

Arguments

val1

Numerator value(s); may be a single value or a vector.

val2

Denominator value(s); may be a single value or a vector.

Value

A numeric ratio where possible, otherwise a character QA/QC flag.

Details

The following conditions are checked before returning a value:

• DATA_01: Missing data required to calculate the index

• DATA_03: Denominator is zero, so the ratio cannot be calculated

Examples

# Calculate the ratio of Peak A to Peak T
pA <- get_fluorescence(example_eems, ex = 250:260, em = 380:480)
pT <- get_fluorescence(example_eems, ex = 270:280, em = 320:350)
rAT <- get_ratios(pA, pT)