img_indices | R Documentation |
Extract image xyz indices (in voxels or millimeters), with the option to append the values
img_indices(img, mask = NULL, add_values = FALSE, units = c("index", "mm"))
img |
Object of class |
mask |
Mask to be applied for indices the index |
add_values |
Should the value be column-bound to the matrix |
units |
Should the indices be in xyz-coordinates or millimeters. |
Matrix of 3 columns if add_values = FALSE
or 4 columns,
otherwise.
set.seed(5) dims = rep(10, 4) arr = array(rpois(prod(dims), lambda = 2), dim = dims) nim = oro.nifti::nifti(arr) ind = img_indices(nim) ind2 = img_indices(nim, mask = nim > 2) # 3d example set.seed(5) dims = rep(10, 3) arr = array(rpois(prod(dims), lambda = 2), dim = dims) nim = oro.nifti::nifti(arr) ind = img_indices(nim) ind2 = img_indices(nim, mask = nim > 2) testthat::expect_equal(colnames(ind2), c("x", "y", "z")) ind2 = img_indices(nim, mask = nim > 2, add_values = TRUE) testthat::expect_equal(colnames(ind2), c("x", "y", "z", "value"))
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.