all.equal.dotprops: all.equal method tailored to dotprops objects

In nat: NeuroAnatomy Toolbox for Analysis of 3D Image Data

all.equal method tailored to dotprops objects

Description

all.equal method tailored to dotprops objects

Usage

## S3 method for class 'dotprops'
all.equal(
  target,
  current,
  check.attributes = FALSE,
  absoluteVectors = TRUE,
  ...
)

Arguments

target, current	dotprops objects to compare
check.attributes	Whether to check attributes (false by default)
absoluteVectors	Whether to check only the absolute value of eigenvectors for equality (default TRUE, see details)
...	Additional arguments passed to base all.equal.

Details

This method is required because the direction vectors are computed using an eigenvector decomposition where the sign of the eigenvector is essentially random and subject to small numerical instabilities. Therefore it does not usually make sense to check the value of vect exactly.

Examples

# equal using default 
kc1=kcs20[[1]]
kc1.recalc=dotprops(kc1)
# not equal due to differences in attributes and vectors
all.equal.default(kc1.recalc, kc1)
# still not equal because of tangent vector flipping
all.equal.default(kc1.recalc, kc1, check.attributes=FALSE)
# equal using appropriate method
stopifnot(isTRUE(all.equal(kc1.recalc, kc1)))
# NB identical when recalculated on same setup from same data
stopifnot(isTRUE(all.equal.default(kc1.recalc, dotprops(kc1))))

nat documentation built on May 29, 2024, 10:36 a.m.