Description Usage Arguments Examples
Calculates observed instantaneous loading rates or concentrations from observed concentrations, flows, and/or fluxes, with units conversions according to the supplied metadata.
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data |
data.frame containing, at a minimum, the columns named by metadata@constituent and metadata@flow |
flux.or.conc |
character giving the desired output format |
metadata |
An object of class "metadata" describing the units of flow (flow.units) and concentration (conc.units) of the input data, and the desired units of load (load.rate.units) for the output data |
calculate |
logical. If FALSE, looks for a column containing the output of interest. If true, uses the other two columns (out of those for conc, flow, and flux) to calculate the output of interest. |
attach.units |
logical. If TRUE, the converted observations are returned with units attached. |
1 2 3 4 5 6 7 8 9 10 | data(eg_metadata)
obs <- data.frame(MyConc=(1:10)/10, MyFlow=rep(10,10), MyFlux=2) # intentionally inconsistent
md <- updateMetadata(eg_metadata, constituent="MyConc", flow="MyFlow",
load.rate="MyFlux", dates="none", flow.units="cms", conc.units="mg/l",
load.units="g", load.rate.units="g/s", custom=NULL)
observeSolute(obs, "flux", md, attach.units=TRUE) # calculate from conc & flow
observeSolute(obs, "flux", md, calculate=FALSE, attach.units=TRUE) # read flux from data
observeSolute(obs, "conc", md, calculate=TRUE, attach.units=TRUE) # calculate from flow & flux
observeSolute(obs, "conc", md, calculate=FALSE, attach.units=TRUE) # read conc from data
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