SAMs: Boundary Data of Shoot Apical Meristems

Description

The data consist of the boundary data of the shoot apical meristems (SAMs) from six genera.

Usage

data(SAMs)

Arguments

Details

In the data set, there are three columns of variables: Genus, x, and y. Genus saves the genus information for each SAM; x saves the \(x\) coordinates of the six SAMs in the Cartesian coordinate system (unitless); and y saves the \(y\) coordinates of the six SAMs in the Cartesian coordinate system (unitless). In Genus, there are six genera including Glycine, Coleus, Juniperus, Pinus, Equisetum, and Isoetes, spanning the three lineages: angiosperms, gymnosperms, and pteridophytes.

References

Shi, P., Gielis, J., Quinn, B.K., Niklas, K.J., Ratkowsky, D.A., Schrader, J., Ruan, H., Wang, L., Niinemets, Ü. (2022) 'biogeom': An R package for simulating and fitting natural shapes. Annals of the New York Academy of Sciences 1516, 123\(-\)134. tools:::Rd_expr_doi("10.1111/nyas.14862")

Examples

Run this code

#### See Shi et al. (2025) for details #########################################
# Shi, P., Liu, X., Gielis, J., Beirinckx, B., Niklas, K.J. (2025) 
#     Comparison of six non-linear equations in describing the 2-D 
#     profiles of apical meristems. American Journal of Botany (under review).
################################################################################

data(SAMs)

uni.sam <- sort( unique(SAMs$Genus) )
ind     <- 2
Data    <- SAMs[SAMs$Genus==uni.sam[ind], ]
x0      <- Data$x
y0      <- Data$y

Res1    <- adjdata(x0, y0, ub.np=200, times=1.2, len.pro=1/20)
X       <- Res1$x
Y       <- Res1$y

dev.new()
plot( X, Y, pch=1, cex.lab=1.5, cex.axis=1.5, 
      xlab=expression(paste(italic(x), " (unitless)", sep="")), 
      ylab=expression(paste(italic(y), " (unitless)", sep="")) )

graphics.off()