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# Retrieve endpoint information from the chyaml field of a chent object
R6 class objects of class chent represent chemical entities and can hold
a list of information loaded from a chemical yaml file in their chyaml
field. Such information is extracted and optionally aggregated by this
function.
## Usage
``` r
endpoint(
chent,
medium = "soil",
type = c("degradation", "sorption"),
lab_field = c(NA, "laboratory", "field"),
redox = c(NA, "aerobic", "anaerobic"),
value = c("DT50ref", "Kfoc", "N"),
aggregator = geomean,
raw = FALSE,
signif = 3
)
soil_DT50(
chent,
aggregator = geomean,
signif = 3,
lab_field = "laboratory",
value = "DT50ref",
redox = "aerobic",
raw = FALSE
)
soil_Kfoc(chent, aggregator = geomean, signif = 3, value = "Kfoc", raw = FALSE)
soil_N(chent, aggregator = mean, signif = 3, raw = FALSE)
soil_sorption(
chent,
values = c("Kfoc", "N"),
aggregators = c(Kfoc = geomean, Koc = geomean, N = mean),
signif = c(Kfoc = 3, N = 3),
raw = FALSE
)
```
## Arguments
- chent:
The chent object to get the information from
- medium:
The medium for which information is sought
- type:
The information type
- lab_field:
If not NA, do we want laboratory or field endpoints
- redox:
If not NA, are we looking for aerobic or anaerobic data
- value:
The name of the value we want. The list given in the usage section is
not exclusive
- aggregator:
The aggregator function. Can be mean,
[`geomean`](https://pkgdown.jrwb.de/pfm/reference/geomean.md), or
identity, for example.
- raw:
Should the number(s) be returned as stored in the chent object (could
be a character value) to retain original information about precision?
- signif:
How many significant digits do we want
- values:
The values to be returned
- aggregators:
A named vector of aggregator functions to be used
## Value
The result from applying the aggregator function to the values converted
to a numeric vector, rounded to the given number of significant digits,
or, if raw = TRUE, the values as a character value, retaining any
implicit information on precision that may be present.
## Details
The functions `soil_*` are functions to extract soil specific endpoints.
For the Freundlich exponent, the capital letter `N` is used in order to
facilitate dealing with such data in R. In pesticide fate modelling,
this exponent is often called 1/n.
|
