View source: R/images2matrix.R
images2matrix | R Documentation |
Creates a matrix, where the voxels are on the rows and images are on the columns
images2matrix(imgs, mask = NULL)
imgs |
Vector of files or list of images (niftiImage, array, or nifti) |
mask |
Binary image to subset the voxels |
Matrix of V by p, where V is the product of the dimensions of one image or the number of voxels in the mask, and p is the number of images
set.seed(5) dims = rep(10, 3) arr = array(rpois(prod(dims), lambda = 2), dim = dims) nim = oro.nifti::nifti(arr) imgs = list(nim, arr) mask = nim > 2 mat1 = images2matrix(imgs) mat2 = images2matrix(list(nim, nim)) if (packageVersion("oro.nifti") >= package_version("0.10.2")) { testthat::expect_equal(mat1, mat2) } else { testthat::expect_error(testthat::expect_equal(mat1, mat2)) } mat1 = images2matrix(imgs, mask = mask) mat2 = images2matrix(list(nim, nim), mask)
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