diff --git a/unit_tests/fdt/dtifit/bvecs b/unit_tests/fdt/dtifit/bvecs
new file mode 100644
index 0000000000000000000000000000000000000000..01bd597f4298fa6df910e41f933e59c4ef9d30eb
--- /dev/null
+++ b/unit_tests/fdt/dtifit/bvecs
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diff --git a/unit_tests/fdt/dtifit/feedsRun b/unit_tests/fdt/dtifit/feedsRun
index bea1b60153c38c1b2d39070f7d35eeea6d593dd4..a0b3c1856d3795b68a314bf648dfc4da19d5e6a8 100755
--- a/unit_tests/fdt/dtifit/feedsRun
+++ b/unit_tests/fdt/dtifit/feedsRun
@@ -56,24 +56,33 @@ def gen_data():
diffusion_tensor = (eigen_values[..., None] * eigen_vectors[..., None, :] * eigen_vectors[..., :, None]).sum(-3)
+ partial_bvecs = np.genfromtxt('bvecs')
+
for multi_shell in (False, True): # we should get the same results for single or multi-shell data
directory[1] = 'multi' if multi_shell else 'single'
+
+ if multi_shell:
+ bvals = np.zeros(210)
+ bvals[10:110] = 1000.
+ bvals[110:] = 2000.
+ bvecs = np.concatenate((
+ np.zeros((10, 3)),
+ partial_bvecs,
+ partial_bvecs,
+ ), axis=0)
+ else:
+ bvals = np.zeros(110)
+ bvals[10:] = 1000.
+ bvecs = np.concatenate((
+ np.zeros((10, 3)),
+ partial_bvecs,
+ ), axis=0)
+
for kurt in (0, 1, 2): # 0: no kurtosis; 1: single kurtosis; 2: parallel and perpendicular kurtosis
if kurt != 0 and not multi_shell:
continue
directory[2] = ['', 'kurt', 'kurtdir'][kurt]
- bvals = np.full(50, 1000.)
- if multi_shell:
- bvals[25:] = 2000.
- bvals[::10] = 0.
-
- bvecs_fn = os.path.join(OUTDIR, "bvecs")
- run(['gps', '--ndir=50', '--out={}'.format(bvecs_fn)], check=True)
- bvecs = np.genfromtxt(bvecs_fn)
- assert bvecs.shape == (50, 3), f"GPS produced bvecs-file with shape {bvecs.shape} rather than the expected (50, 3)"
- testing.assert_allclose((bvecs ** 2).sum(-1), 1.)
-
if kurt == 2:
kvec = np.array([0.1, 0.05, 0.2])
beig = (