generateTPData | R Documentation |
This function generates random stable isotope (d13C and d15N) data to use basic functions and calculations coded within the package.
generateTPData( n.baselines = 2, n.obsB = 25, dNb1 = NULL, sd.dNb1 = 1, dCb1 = NULL, sd.dCb1 = 1, dNb2 = NULL, sd.dNb2 = 1, dCb2 = NULL, sd.dCb2 = 1, n.obsC = 25, consumer = NULL, dNc = NULL, sd.dNc = 1, dCc = NULL, sd.dCc = 1, DeltaN = 3.4, sd.DeltaN = 0.98, n.obsDeltaN = 56, DeltaC = 0.39, sd.DeltaC = 1.3, n.obsDeltaC = 107, seed = 3 )
n.baselines |
number of baselines (could be 1 or 2), default is 2. |
n.obsB |
number of observations for baselines. Default is 25. |
dNb1 |
mean value for d15N of baseline 1. Default is a random number between -5 and 5. |
sd.dNb1 |
standard deviation for d15N of baseline 1. |
dCb1 |
mean value for d13C of baseline 1. |
sd.dCb1 |
standard deviation for d13C of baseline 1. |
dNb2 |
mean value for d15N of baseline 2. |
sd.dNb2 |
standard deviation for d15N of baseline 2. |
dCb2 |
mean value for d13C of baseline 2. |
sd.dCb2 |
standard deviation for d13C of baseline 2. |
n.obsC |
number of observations for consumer. Default is 25. |
consumer |
string for consumer. |
dNc |
mean value for d15N of consumer. Default value is dNb1 multiplied 2 times the trophic discrimination factor. |
sd.dNc |
standard deviation for d15N of consumer. |
dCc |
mean value for d13C of consumer. |
sd.dCc |
standard deviation for d13C of consumer. |
DeltaN |
mean value for trophic discrimination factor of nitrogen. Default value is 3.4. |
sd.DeltaN |
standard deviation for trophic discrimination factor of nitrogen. Default value is 0.98. |
n.obsDeltaN |
number of observations of deltaN (trophic discrimination factor). Default value is 56. |
DeltaC |
mean value for trophic discrimination factor of carbon. Default value is 0.39. |
sd.DeltaC |
standard deviation for trophic discrimination factor for carbon. Default value is 1.3. |
n.obsDeltaC |
number of observations of DeltaC (trophic discrimination factor). Default is 107. |
seed |
numerical value to get reproducible results. |
An isotopeData class object (named list) with dNb1, dNc and deltaN randomly generated observations. If n.baselines = 2, then dCb1, dNb2, dCb2, dCc and deltaC are also returned.
## Good data a <-generateTPData(dCb1 = -10, dNb1 = -10, dCc = -4, dNc = 4, dCb2 = 2, dNb2 = 0) plot(a) ## Consumer more enriched in carbon b <-generateTPData(dCb1 = -10, dCc = 0, dCb2 = -2) plot(b) ## Consumer much more enriched c <-generateTPData(dCb1 = -10, dCc = 3, dCb2 = -2) plot(c)
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