photobiology: T2A – R documentation

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photobiology

T2A

Convert transmittance into absorbance.

Description

Function that converts transmittance (fraction) into absorbance (a.u.).

Usage

T2A(x, action, byref, clean, ...)

## Default S3 method:
T2A(x, action = NULL, byref = FALSE, ...)

## S3 method for class 'numeric'
T2A(x, action = NULL, byref = FALSE, clean = TRUE, ...)

## S3 method for class 'filter_spct'
T2A(x, action = "add", byref = FALSE, clean = TRUE, ...)

## S3 method for class 'filter_mspct'
T2A(
  x,
  action = "add",
  byref = FALSE,
  clean = TRUE,
  ...,
  .parallel = FALSE,
  .paropts = NULL
)

Arguments

`x`	an R object
`action`	character Allowed values "replace" and "add"
`byref`	logical indicating if new object will be created by reference or by copy of x
`clean`	logical replace off-boundary values before conversion
`...`	not used in current version
`.parallel`	if TRUE, apply function in parallel, using parallel backend provided by foreach
`.paropts`	a list of additional options passed into the foreach function when parallel computation is enabled. This is important if (for example) your code relies on external data or packages: use the .export and .packages arguments to supply them so that all cluster nodes have the correct environment set up for computing.

Value

A copy of x with a column A added and other columns possibly deleted except for w.length. If action = "replace", in all cases, the additional columns are removed, even if no column needs to be added.

Methods (by class)

default: Default method for generic function
numeric: Method for numeric vectors
filter_spct: Method for filter spectra
filter_mspct: Method for collections of filter spectra

T2A