Description Usage Arguments Details Value Note Author(s) References See Also Examples
GaussPara
is a generci function to find Gaussian parameters in
any response function. In Gaussian function, these will be the real
Gaussian paramters, in other models similar parameters for the height
at optimum ("top"
), location of the optimum ("opt"
) and
the width of the response at height exp(-0.5)*top
. For
unsymmetric responses, parameter tol
gives the width to the
left and tol.right
the width to the right of opt
.
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resp |
Response function for a single species or a list of responses from a data frame method. |
... |
Other parameters. See individual response models for possible other paraemters. |
See individual response functions for more details.
Returns an object with (at least) items top
for the height at the
optimum, opt
for the location of the optimum), tol
for
the width to the left of the optimum, tol.right
width to the right
of the optimum or text symmetric
for symmetric
responses. Individual response functions may add some items to these.
Currently implemented only for HOF
.
Jari Oksanen
Lawesson, J.E. & Oksanen, J. (2002) Niche characteristics of Danish woody species as derived from coenoclines. Journal of Vegetation Science 13: 279-290. (For HOF models.)
HOF
is the only implementation. If the parameters cannot
be found in closed form, optimize
is used for opt
and uniroot
for tol
and tol.right
.
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