antsTransformPhysicalPointToIndex.Rd
Get index from spatial point of an 'antsImage'.
antsTransformPhysicalPointToIndex(x, point)
x | Image object of S4 class 'antsImage' to get values from. |
---|---|
point | image physical point |
array of pixel values
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")