calc_gSGC {Luminescence} | R Documentation |
Calculate De value based on the gSGC by Li et al., 2015
Description
The function computes De value and De value error using the global standardised growth curve (gSGC) assumption proposed by Li et al., 2015 for OSL dating of sedimentary quartz.
Usage
calc_gSGC(
data,
gSGC.type = "0-250",
gSGC.parameters,
n.MC = 100,
verbose = TRUE,
plot = TRUE,
...
)
Arguments
data |
data.frame (required):
input data the following columns five columns in the given order:
|
gSGC.type |
character (with default):
function parameters to use for the iteration procedure, either |
gSGC.parameters |
list (optional):
option to provide own function parameters used for fitting as named list.
Nomenclature follows Li et al., 2015, i.e. |
n.MC |
integer (with default): number of Monte Carlo simulation runs for error estimation, see details. |
verbose |
logical (with default): enable/disable output to the terminal. |
plot |
logical (with default): enable/disable the plot output. |
... |
parameters will be passed to the plot output |
Details
The error of the De value is determined using a Monte Carlo simulation approach.
Solving of the equation is realised using uniroot.
Large values for n.MC
will significantly increase the computation time.
Value
Returns an S4 object of type RLum.Results.
@data
$ De.value
(data.frame)
.. $ De
.. $ De.error
.. $ Eta
$ De.MC
(list) contains the matrices from the error estimation.
$ uniroot
(list) contains the uniroot outputs of the De estimations
@info
'$ call“ (call) the original function call
Function version
0.1.2
How to cite
Kreutzer, S., 2025. calc_gSGC(): Calculate De value based on the gSGC by Li et al., 2015. Function version 0.1.2. In: Kreutzer, S., Burow, C., Dietze, M., Fuchs, M.C., Schmidt, C., Fischer, M., Friedrich, J., Mercier, N., Philippe, A., Riedesel, S., Autzen, M., Mittelstrass, D., Gray, H.J., Galharret, J., Colombo, M., Steinbuch, L., Boer, A.d., 2025. Luminescence: Comprehensive Luminescence Dating Data Analysis. R package version 1.1.0. https://r-lum.github.io/Luminescence/
Author(s)
Sebastian Kreutzer, Institute of Geography, Heidelberg University (Germany) , RLum Developer Team
References
Li, B., Roberts, R.G., Jacobs, Z., Li, S.-H., 2015. Potential of establishing a 'global standardised growth curve' (gSGC) for optical dating of quartz from sediments. Quaternary Geochronology 27, 94-104. doi:10.1016/j.quageo.2015.02.011
See Also
RLum.Results, get_RLum, uniroot
Examples
results <- calc_gSGC(data = data.frame(
LnTn = 2.361, LnTn.error = 0.087,
Lr1Tr1 = 2.744, Lr1Tr1.error = 0.091,
Dr1 = 34.4))
get_RLum(results, data.object = "De")