Passiflora is a genus of about 550 species of flowering plants. This dataset contains 15 landmarks in 2 dimension of 3319 leaves of 40 species. Papers listed in the reference section analyzed the data and found 7 clusters.
Usage
data(passiflora)Format
a named list containing
- data
a 3d array of size \((15\times 2\times 3319)\).
- species
a length-\(3319\) vector of 40 species factors.
- class
a length-\(3319\) vector of 7 cluster factors.
References
Chitwood DH, Otoni WC (2017). “Divergent leaf shapes among Passiflora species arise from a shared juvenile morphology.” Plant Direct, 1(5), e00028. ISSN 24754455.
Chitwood DH, Otoni WC (2017). “Morphometric analysis of Passiflora leaves: the relationship between landmarks of the vasculature and elliptical Fourier descriptors of the blade.” GigaScience, 6(1). ISSN 2047-217X.
Examples
data(passiflora) # load the data
riemobj = wrap.landmark(passiflora$data) # wrap as RIEMOBJ
pga2d = riem.pga(riemobj)$embed # embedding via PGA
opar <- par(no.readonly=TRUE) # visualize
plot(pga2d, col=passiflora$class, pch=19, cex=0.7,
main="PGA Embedding of Passiflora Leaves",
xlab="dimension 1", ylab="dimension 2")
par(opar)