coo_baseline: Baseline shapes

In MomX/Momocs2: Modern Morphometrics and Shape Manipulation

Description

Register shapes on new baseline, that is defines certain points, to be on certain target points, that is homogeneizes for scale, rotation and position.

Usage

coo_baseline(
  x,
  target1,
  target2,
  id1,
  id2,
  ldk1,
  ldk2,
  from_col,
  ldk_col,
  to_col,
  ...
)

coo_bookstein(x, id1, id2, ldk1, ldk2, from_col, ldk_col, to_col, ...)

Arguments

x	coo_single, coo_list or mom_tbl
target1, target2	numeric xy coordinates of target baseline
id1, id2	integer which rows to use as points being registered
ldk1, ldk2	integer which ldk represent the points being registered
from_col	colnames from where to get the coo_list and how to name the resulting one (only for mom_tbl method)
ldk_col	column name to use for landmakrs
to_col	colnames from where to get the coo_list and how to name the resulting one (only for mom_tbl method)
...	useless here

Details

coo_bookstein is just a coo_baseline with target1=c(-0.5, 0) and target2=c(0.5, 0). Given coo_baseline defaults, if the two targets are not modified, the two methods are equivalent.

Value

a coo_single, coo_list or mom_tbl

Functions

• coo_bookstein: special case of Bookstein coordinates

Note

todo review

See Also

Other coo_modifyers: coo_align(), coo_center(), coo_reflect, coo_rev(), coo_rotatecenter(), coo_rotate(), coo_sample_rr(), coo_sample(), coo_scale(), coo_shear(), coo_slide(), coo_split(), coo_template(), coo_trans(), coo_trim(), coo_up()

Examples

# default target1 and target2
# are Bookstein coordinates
bot %>% pick(1) %>%
  coo_center %>% coo_align %>% coo_up() %>%
  coo_baseline() %>% gg()

hearts %>%
dplyr::slice(1:5) %>%
  dplyr::rename(foo=ldk) %>%
  coo_baseline(ldk1=2, ldk2=4,
    target1=c(-10, 0), target2=c(20, 0),
    ldk_col=foo) %>%
    coo_slide(ldk=4, ldk_col=foo) %>%
 pile(alpha=0.1)

MomX/Momocs2 documentation built on May 13, 2020, 4:28 a.m.