added test and some missing files in last commit

Author: oesteban

CHANGES

@@ -1,6 +1,7 @@
 Next Release
 ============
 
+* ENH: New miscelaneous interfaces: SplitROIs, MergeROIs to enable parallel processing of very large images.
 * ENH: Updated FSL interfaces: BEDPOSTX and XFibres, former interfaces are still available with the prefix `Old`.
 * ENH: New FSL interface: EpiReg
 * ENH: New Freesurfer interface: Tkregister2 (for conversion of fsl style matrices to freesurfer format)

nipype/algorithms/tests/test_splitmerge.py

@@ -0,0 +1,37 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+import os
+from shutil import rmtree
+from tempfile import mkdtemp
+from nipype.testing import (assert_equal, example_data)
+
+
+def test_split_and_merge():
+    import numpy as np
+    import nibabel as nb
+    import os.path as op
+    from nipype.algorithms.misc import split_rois, merge_rois
+    tmpdir = mkdtemp()
+
+    in_mask = example_data('tpms_msk.nii.gz')
+    dwfile = op.join(tmpdir, 'dwi.nii.gz')
+    mskdata = nb.load(in_mask).get_data()
+    aff = nb.load(in_mask).get_affine()
+
+    dwshape = (mskdata.shape[0], mskdata.shape[1], mskdata.shape[2], 6)
+    dwdata = np.random.normal(size=dwshape)
+
+    os.chdir(tmpdir)
+    nb.Nifti1Image(dwdata.astype(np.float32),
+                   aff, None).to_filename(dwfile)
+
+    resdw, resmsk, resid = split_rois(dwfile, in_mask, roishape=(20, 20, 2))
+    merged = merge_rois(resdw, resid, in_mask)
+    dwmerged = nb.load(merged).get_data()
+
+    dwmasked = np.zeros_like(dwdata)
+    dwmasked = dwdata * mskdata[:, :, :, np.newaxis]
+    rmtree(tmpdir)
+
+    yield assert_equal, np.allclose(dwmasked, dwmerged), True