Oyster_ellipse_parameters: Function that calculates the parameters of the base ellipse used for
bivalve growth modelling
Description
Calculates the parameters a and b of the ellipse that forms
the base of the shell in growth modelling.
de Winter, N. J. (2017) <doi:10.5194/gmd-2017-137>
Data frame that contains characteristics of every
sub-increment
IncG
Matrix of X- and Y-coordinates of all interpolated
sub-increments
Oyster_height
Measured maximum height of the shell
Oyster_length
Measured maximum length of the shell in anterio-posterior direction
Value
subincr_matrix
Updated data frame that contains characteristics
of every sub-increment, with ellipse parameters added
Details
Parameters of the base ellipse of the shell are calculated by
calculating the ratio between measured shell height and length and the
endpoints of all sub-increments
References
de Winter, N. J.: ShellTrace v1.0 ? A new approach for modelling
growth and trace element uptake in marine bivalve shells: Model verification
on pacific oyster shells (Crassostrea gigas), Geosci. Model Dev. Discuss.,
https://doi.org/10.5194/gmd-2017-137, in review, 2017.