Description Usage Details Value Author(s) See Also Examples
These functions generate various other functions for making computations under various assumptions about the underlying selection curve.
1 2 3 4 5 6 7 8 9 |
sel.curves
is a list with the names of the five
selection curve functions.
For norm.loc
, norm
, lognorm
,
gamm
, and inv.gau
, a list of functions:
loglinpredictors calculates the predictors used in log-linear model fitting
off calculates the offset term for log-linear model fitting
selcurvparams calculates the parameters of the selection curve from the coefficients of the terms in the log linear model
curv calculates a matrix of values from the selection curve from two matrices of the same size giving the fish lengths and mesh sizes
peak calculates the peak of the selection curve for different mesh sizes
Steve Walker
1 2 3 | data(north.pike)
np <- make.catch(north.pike$MESH, north.pike$FLEN)
lapply(sel.curves, function(x) fit.catch(np, eval(x)))
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