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filled out the functions #25

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filled out the functions #25

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24 changes: 20 additions & 4 deletions spm_funcs.py
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Original file line number Diff line number Diff line change
Expand Up @@ -37,8 +37,14 @@ def spm_global(vol):
g : float
SPM global metric for `vol`
"""
T = np.mean(vol) / 8
return np.mean(vol[vol > T])
M = np.mean(vol)
T = M/8
#- Select voxels greater than T
voxels_within = vol>T
#- Calculate mean
mean_over_T = np.mean(vol[voxels_within])
# Show the result
return mean_over_T


def get_spm_globals(fname):
Expand All @@ -54,8 +60,18 @@ def get_spm_globals(fname):
spm_vals : array
SPM global metric for each 3D volume in the 4D image.
"""
# +++your code here+++
# return
#- Load the image given by "fname".
img = nib.load(fname)
#- Get the data
data = img.get_fdata()
#- Calculate the SPM global value for each volume.
spm_vals = []
for i in range(data.shape[3]): #we could also use -1 here
vol = data[...,i]
x = spm_global(vol) #you can either put this directly inside the append method or
#... you can save a temporary varibale in the same loop
spm_vals.append(x)
return spm_vals


def main():
Expand Down