Description Usage Arguments Value Examples
Optimization method for the von Caemmerer C4 photosynthesis model.
1 2 | OpEC4photo(obsDat, iVcmax = 60, iVpmax = 120, iVpr = 80,
iJmax = 400, co2 = 380, o2 = 210, level = 0.95)
|
obsDat |
observed assimilation data, which should be a data frame or matrix. The first column should be observed net assimilation rate (μ mol m^{-2} s^{-1}). The second column should be the observed quantum flux (μ mol m^{-2} s^{-1}). The third column should be observed temperature of the leaf (Celsius). The fourth column should be the observed relative humidity in proportion (e.g. 0.7). |
iVcmax |
initial value for Vcmax (default = 60). |
iVpmax |
initial value for Vpmax (default = 120). |
iVpr |
initial value for Vpr (default = 80). |
iJmax |
initial value for Jmax (default = 400). |
co2 |
atmospheric CO2 concentration (ppm), default = 380. |
o2 |
atmospheric O2 concentration (mmol/mol), default = 210. |
level |
level for the confidence intervals. |
an object of class OpEC4photo
. Notice that
these are the new-style S4 classes.
1 2 3 4 5 6 7 | data(obsNaid)
## These data are from Naidu et al. (2003)
## in the correct format
res <- OpEC4photo(obsNaid)
## Other example using Beale, Bint and Long (1996)
data(obsBea)
resB <- OpEC4photo(obsBea)
|
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