T2A: Convert transmittance into absorbance.

In photobiology: Photobiological Calculations

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)

• T2A(default): Default method for generic function

• T2A(numeric): Method for numeric vectors

• T2A(filter_spct): Method for filter spectra

• T2A(filter_mspct): Method for collections of filter spectra

See Also

Other quantity conversion functions: A2T(), Afr2T(), T2Afr(), any2T(), as_quantum(), e2qmol_multipliers(), e2quantum_multipliers(), e2q(), q2e()

photobiology documentation built on Oct. 21, 2023, 1:06 a.m.