antsTransformPhysicalPointToIndex: Get Index from Spatial Point

In stnava/ANTsR: ANTs in R: Quantification Tools for Biomedical Images

Get Index from Spatial Point

Description

Get index from spatial point of an 'antsImage'.

Usage

antsTransformPhysicalPointToIndex(x, point)

Arguments

x	Image object of S4 class 'antsImage' to get values from.
point	image physical point

Value

array of pixel values

Examples

img <- makeImage(c(10, 10), rnorm(100))
pt <- antsTransformPhysicalPointToIndex(img, c(2, 2))
arr <- as.array(img)
testthat::expect_error(
  antsTransformPhysicalPointToIndex(arr, c(2, 2)), "antsImage"
)
testthat::expect_error(
  antsTransformPhysicalPointToIndex(img, c("2", 2)), "point must be"
)
testthat::expect_error(
  antsTransformPhysicalPointToIndex(img, c(2, 2, 2)), "matrix must be of"
)

stnava/ANTsR documentation built on April 16, 2024, 12:17 a.m.