adjdata | Boundary Data Adjustment of A Polygon |

areaGE | Area Calculation for the Gielis Curve Within [0, 2pi) |

areaovate | Area Calculation for an Ovate Polygon |

bambooleaves | Leaf Boundary Data of _Phyllostachys incarnata_ T. H. Wen (Poaceae: Bambusoideae) |

bilat | Measure of the Extent of Bilateral Symmetry of A Polygon |

biogeom | Biological Geometries |

curveEPE | Drawing the Preston Curve Produced by the the Explicit Preston Equation |

curveETE | Drawing the Troscianko Curve Produced by the Explicit Troscianko Equation |

curveGE | Drawing the Gielis Curve |

curveNRGE | Drawing the Egg Shape Predicted by the Narushin-Romanov-Griffin Equation |

curveovate | Drawing the Ovate Leaf-Shape Curve |

DEPE | Calculation of the First-Order Derivative of the Explicit Preston Equation |

DETE | Calculation of the First-Order Derivative of the Explicit Troscianko Equation |

DNRGE | Calculation of the First-Order Derivative of the Narushin-Romanov-Griffin Equation |

DSGE | Calculation of the First-Order Derivative of the Simplified Gielis Equation |

eggs | Egg Boundary Data of Nine Species of Birds |

EPE | Calculation of the Ordinate For an Arbitrary Point on the Preston Curve in the Plane |

ETE | Calculation of the Ordinate For an Arbitrary Point on the Troscianko Curve in the Plane |

fitEPE | Data-Fitting Function for the Explicit Preston Equation |

fitETE | Data-Fitting Function for the Explicit Troscianko Equation |

fitGE | Data-Fitting Function for the Gielis Equation |

fitLorenz | Data-Fitting Function for the Rotated and Right-Shifted Lorenz Curve |

fitNRGE | Parameter Estimation for the Narushin-Romanov-Griffin Equation |

fitovate | Data-Fitting Function for the Ovate Leaf-Shape Equation |

fitsigmoid | Data-Fitting Function for the Sigmoid Growth Equation |

fitSuper | Data-Fitting Function for the Superellipse Equation |

fracdim | Calculation of Fractal Dimension of Lef Veins Based on the Box-Counting Method |

GE | Calculation of the Polar Radius of the Gielis Curve |

ginkgoseed | Boundary Data of the Side Projections of _Ginkgo biloba_ Seeds |

kp | Boundary Data of the Vertical Projections of _Koelreuteria paniculata_ Fruit |

LeafSizeDist | Leaf size distribution of _Shibataea chinensis_ |

lmPE | Parameter Estimation for the Todd-Smart Equation |

lmTE | Parameter Estimation for the Troscianko Equation |

MbetaE | Modified Beta Equation |

MBriereE | Modified Briere Equation |

MLRFE | Modified Lobry-Rosso-Flandrois (LRF) Equation |

MPerformanceE | Modified Performance Equation |

Neocinnamomum | Leaf Boundary Data of Seven Species of _Neocinnamomum_ |

NRGE | The Narushin-Romanov-Griffin Equation (NRGE) |

PE | Calculation of the Abscissa, Ordinate and Distance From the Origin For an Arbitrary Point on the Preston Curve |

SarabiaE | Sarabia Equation |

SCSE | Sarabia-Castillo-Slottje Equation (SCSE) |

SHE | Sitthiyot-Holasut Equation |

shoots | Height Growth Data of Bamboo Shoots |

sigmoid | Sigmoid Growth Equation |

starfish | Boundary Data of Eight Sea Stars |

SurfaceAreaEPE | Calculation of the Surface Area of An Egg Based on the Explicit Preston Equation |

SurfaceAreaETE | Calculation of the Surface Area of An Egg Based on the Explicit Troscianko Equation |

SurfaceAreaNRGE | Calculation of the Surface Area of An Egg Based on the Narushin-Romanov-Griffin Equation |

SurfaceAreaSGE | Calculation of the Surface Area of An Egg Based on the Simplified Gielis Equation |

TE | The Troscianko Equation (TE) |

TGE | Calculation of the Polar Radius of the Twin Gielis Curve |

TSE | The Todd-Smart Equation (TSE) |

veins | Leaf Vein Data of _Michelia compressa_ |

VolumeEPE | Calculation of the Volume of An Egg Based on the Explicit Preston Equation |

VolumeETE | Calculation of the Volume of An Egg Based on the Explicit Troscianko Equation |

VolumeNRGE | Calculation of the Volume of An Egg Based on the Narushin-Romanov-Griffin Equation |

VolumeSGE | Calculation of the Volume of An Egg Based on the Simplified Gielis Equation |

whitespruce | Planar Coordinates of _Picea glauca_ Tree Rings |