Extract fluorescence peaks

Usage

eem_peaks(eem, ex, em, verbose = TRUE)

Arguments

eem: An object of class eemlist.
ex: A numeric vector with excitation wavelengths.
em: A numeric vector with emission wavelengths.
verbose: Logical determining if additional messages should be printed.

Value

An object of class eemlist.

A data frame containing excitation and emission peak values. See details for more information.

Interpolation

Different excitation and emission wavelengths are often used to measure EEMs. Hence, it is possible to have mismatchs between measured wavelengths and wavelengths used to calculate specific metrics. In these circumstances, EEMs are interpolated using the interp2 function from the parcma library. A message warning the user will be prompted if data interpolation is performed.

Examples

file <- system.file("extdata/cary/scans_day_1/", "sample1.csv", package = "eemR")
eem <- eem_read(file, import_function = "cary")

eem_peaks(eem, ex = c(250, 350), em = c(300, 400))
#>    sample  ex  em peak_intensity
#> 1 sample1 250 300      0.2318111
#> 2 sample1 350 400      1.7270385