eggs {biogeom}

Egg Boundary Data of Nine Species of Birds

Description

The data consist of the egg boundary data of nine species of birds.

Usage

data(eggs)

Details

In the data set, there are four columns of variables: Code, LatinName, x, and y. Code saves the codes of individual eggs; LatinName saves the Latin names of the nine species of birds; x saves the x coordinates of the egg boundary in the Cartesian coordinate system (cm); and y saves the y coordinates of the egg boundary in the Cartesian coordinate system (cm). In Code, codes 1-9 represent Strix uralensis, Dromaius novaehollandiae, Turdus philomelos, Gallus gallus, Pandion haliaetus, Uria aalge, Uria lomvia, Gallinago media, and Aptenodytes patagonicus, respectively.

References

Narushin, V.G., Romanov, M.N., Griffin, D.K. (2021) Egg and math: introducing a universal formula for egg shape. Annals of the New York Academy of Sciences 1505, 169-177. doi:10.1111/nyas.14680

Shi, P., Gielis, J., Niklas, K.J. (2022) Comparison of a universal (but complex) model for avian egg shape with a simpler model. Annals of the New York Academy of Sciences 1514, 34-42. doi:10.1111/nyas.14799

Tian, F., Wang, Y., Sandhu, H.S., Gielis, J., Shi, P. (2020) Comparison of seed morphology of two ginkgo cultivars. Journal of Forestry Research 31, 751-758. doi:10.1007/s11676-018-0770-y

Examples

data(eggs)

uni.C <- sort( unique(eggs$Code) )
ind   <- 8
Data  <- eggs[eggs$Code==uni.C[ind], ]
x0    <- Data$x
y0    <- Data$y

Res1 <- adjdata(x0, y0, ub.np=1000, times=1.2, len.pro=1/20)
x1   <- Res1$x
y1   <- Res1$y

dev.new()
plot( x1, y1, asp=1, cex.lab=1.5, cex.axis=1.5, type="l", 
      xlab=expression(italic("x")), ylab=expression(italic("y")),
      pch=1, col=1 ) 

Res2 <- adjdata(x0, y0, ub.np=60, times=1, len.pro=1/2, index.sp=20)
x2   <- Res2$x
y2   <- Res2$y

Res3 <- adjdata(x0, y0, ub.np=60, times=1, len.pro=1/2, index.sp=100)
x3   <- Res3$x
y3   <- Res3$y

dev.new()
plot( x2, y2, asp=1, cex.lab=1.5, cex.axis=1.5, 
      xlab=expression(italic("x")), ylab=expression(italic("y")),
      pch=1, col=4 ) 
points( x3, y3, col=2)

graphics.off()