R: Convert transmittance into absorbance.

T2A {photobiology} | R Documentation

## 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, 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.

### Methods (by class)

- `default`: Default method for generic function

- `filter_spct`: Method for filter spectra

- `filter_mspct`: Method for collections of filter spectra

### See Also

Other quantity conversion functions: `A2T`, `T2Afr`, `T2T`, `as_quantum`, `e2qmol_multipliers`, `e2quantum_multipliers`, `e2q`, `q2e`

[Package photobiology version 0.9.21 Index]