def test_getRegressor():
# Set up and load in subject 1 run 1
# This is the convolution method described, in detail on:
# http://practical-neuroimaging.github.io/on_convolution.html
TR = 2
n_vols = 240
tr_times = np.arange(0, 30, TR)
hrf_signal = hrf(tr_times)
behav_cond = pathtotest + 'test_behavdata.txt'
task_cond1 = pathtotest + 'test_cond001.txt'
task_cond2 = pathtotest + 'test_cond002.txt'
task_cond3 = pathtotest + 'test_cond003.txt'
task_cond4 = pathtotest + 'test_cond004.txt'
parameters = merge_cond(behav_cond, task_cond1, task_cond2, task_cond3, task_cond4)
# get neural_signal
neural_signal = events2neural_extend(parameters,TR, n_vols)
# get gain signal
gain_signal = neural_signal[:,1]
# get loss signal
loss_signal = neural_signal[:,2]
# Len of neural signal
N = neural_signal.shape[0]
# Length of hrf_signal
M = len(hrf_signal)
# create the convolved bold signal gain/loss
convolved_gain = np.zeros(N + M - 1) # adding the tail
convolved_loss = np.zeros(N + M - 1) # adding the tail
for i in range(N):
input_value_g = gain_signal[i]
input_value_l = loss_signal[i]
# Adding the shifted, scaled HRF
convolved_gain[i : i + M] += hrf_signal * input_value_g
convolved_loss[i : i + M] += hrf_signal * input_value_l
# Remove the extra_times
n_to_remove = M-1
convolved_gain = convolved_gain[:-n_to_remove]
convolved_loss = convolved_loss[:-n_to_remove]
lin_dr = np.linspace(-1, 1, n_vols)
quad_dr = lin_dr ** 2
quad_dr -= np.mean(quad_dr)
#--------------------------------------------------------------------------#
# my function
myconv_gain, myconv_loss, my_lin, my_quad = getRegressor(TR, n_vols, hrf_signal, neural_signal)
myconv_gain1, myconv_loss1, my_lin1, my_quad1 = getRegressor(TR, n_vols, hrf_signal, neural_signal, standard = True)
#--------------------------------------------------------------------------#
# assert checks
assert (max(abs(convolved_gain-myconv_gain) < .0001))
assert (max(abs(convolved_loss-myconv_loss) < .0001))
assert (max(abs(quad_dr-my_quad) < .0001))
assert (max(abs(lin_dr-my_lin) < .0001))
# Check standard template
assert_allclose(myconv_gain, myconv_gain1)
assert_allclose(myconv_loss, myconv_loss1)
assert (my_lin1 is None)
assert (my_quad1 is None)
def test_getRegressor():
# Set up and load in subject 1 run 1
# This is the convolution method described, in detail on:
# http://practical-neuroimaging.github.io/on_convolution.html
TR = 2
n_vols = 240
tr_times = np.arange(0, 30, TR)
hrf_signal = hrf(tr_times)
behav_cond = pathtotest + 'test_behavdata.txt'
task_cond1 = pathtotest + 'test_cond001.txt'
task_cond2 = pathtotest + 'test_cond002.txt'
task_cond3 = pathtotest + 'test_cond003.txt'
task_cond4 = pathtotest + 'test_cond004.txt'
parameters = merge_cond(behav_cond, task_cond1, task_cond2, task_cond3, task_cond4)
# get neural_signal
neural_signal = events2neural_extend(parameters,TR, n_vols)
# get gain signal
gain_signal = neural_signal[:,1]
# get loss signal
loss_signal = neural_signal[:,2]
# Len of neural signal
N = neural_signal.shape[0]
# Length of hrf_signal
M = len(hrf_signal)
# create the convolved bold signal gain/loss
convolved_gain = np.zeros(N + M - 1) # adding the tail
convolved_loss = np.zeros(N + M - 1) # adding the tail
for i in range(N):
input_value_g = gain_signal[i]
input_value_l = loss_signal[i]
# Adding the shifted, scaled HRF
convolved_gain[i : i + M] += hrf_signal * input_value_g
convolved_loss[i : i + M] += hrf_signal * input_value_l
# Remove the extra_times
n_to_remove = M-1
convolved_gain = convolved_gain[:-n_to_remove]
convolved_loss = convolved_loss[:-n_to_remove]
linear_dr = np.linspace(-1, 1, n_vols)
quadratic_dr = linear_dr ** 2
quadratic_dr -= np.mean(quadratic_dr)
#--------------------------------------------------------------------------#
# my function
myconv_gain, myconv_loss, my_lin, my_quad = getRegressor(TR, n_vols, hrf_signal, neural_signal)
#--------------------------------------------------------------------------#
# assert checks
assert (max(abs(convolved_gain-myconv_gain) < .0001))
assert (max(abs(convolved_loss-myconv_loss) < .0001))
assert (max(abs(quadratic_dr-my_quad) < .0001))
assert (max(abs(linear_dr-my_lin) < .0001))
+ str(i).zfill(2)
+ "/model/model001/onsets/task001_run00"
+ ` j `
+ "/cond003.txt"
)
task_cond4 = (
pathtodata
+ "ds005/sub0"
+ str(i).zfill(2)
+ "/model/model001/onsets/task001_run00"
+ ` j `
+ "/cond004.txt"
)
parameters = merge_cond(behav_cond, task_cond1, task_cond2, task_cond3, task_cond4)
neural_prediction = events2neural_extend(parameters, TR, n_vols)
gain, loss, linear_dr, quad_dr = getRegressor(TR, n_vols, hrf_at_trs, neural_prediction)
data, gain, loss, linear_dr, quad_dr = deleteOutliers(
data, gain, loss, linear_dr, quad_dr, i, run, dvars_out, fd_out
)
data_full = np.concatenate((data_full, data), axis=3)
gain_full = np.concatenate((gain_full, gain), axis=0)
loss_full = np.concatenate((loss_full, loss), axis=0)
linear_full = np.concatenate((linear_full, linear_dr), axis=0)
quad_full = np.concatenate((quad_full, quad_dr), axis=0)
d_shape = data_full.shape[:3]
mea = calcMRSS(data_full, gain_full, loss_full, linear_full, quad_full)
X, Y, beta = calcBeta(data_full, gain_full, loss_full, linear_full, quad_full)
# ------------------------------------------------------------------------------#
# Take the 40,000 voxel
fitted = X.dot(beta[:, 40000])
residuals = Y[:, 40000] - fitted
quad_full = np.empty([0,])
run_count = np.zeros(3)
for j in range(1,4):
direct='ds005/sub0'+str(i).zfill(2)+'/BOLD/task001_run00'+`j`+'/'
boldname = pathtofolder + direct+'bold.nii.gz'
img=nib.load(boldname)
data=img.get_data()
run = j
behav_cond = pathtofolder + 'ds005/sub0'+str(i).zfill(2)+'/behav/task001_run00'+`j`+'/behavdata.txt'
task_cond1 = pathtofolder + 'ds005/sub0'+str(i).zfill(2)+'/model/model001/onsets/task001_run00'+`j`+'/cond001.txt'
task_cond2 = pathtofolder + 'ds005/sub0'+str(i).zfill(2)+'/model/model001/onsets/task001_run00'+`j`+'/cond002.txt'
task_cond3 = pathtofolder + 'ds005/sub0'+str(i).zfill(2)+'/model/model001/onsets/task001_run00'+`j`+'/cond003.txt'
task_cond4 = pathtofolder + 'ds005/sub0'+str(i).zfill(2)+'/model/model001/onsets/task001_run00'+`j`+'/cond004.txt'
parameters = merge_cond(behav_cond, task_cond1, task_cond2, task_cond3, task_cond4)
neural_prediction = events2neural_extend(parameters,TR, n_vols)
gain, loss, linear_dr, quad_dr = getRegressor(TR, n_vols, hrf_at_trs, neural_prediction)
data, gain, loss, linear_dr, quad_dr = deleteOutliers(data, gain, loss, linear_dr, quad_dr, i, run, dvars_out, fd_out)
run_count[j-1] = data.shape[3] ## dummy variable indicating the groups
data_full = np.concatenate((data_full,data),axis=3)
gain_full = np.concatenate((gain_full,gain),axis=0)
loss_full = np.concatenate((loss_full,loss),axis=0)
linear_full = np.concatenate((linear_full,linear_dr),axis=0)
quad_full = np.concatenate((quad_full,quad_dr),axis=0)
run_group = np.concatenate((np.repeat(1, run_count[0]),
np.repeat(2, run_count[1]), np.repeat(3, run_count[2])), axis=0)
thrshd = 400 ## set a threshold to idenfity the voxels inside the brain
print "calculating parameters of subject "+str(i)
beta = calcBetaLme(data_full, gain_full, loss_full, linear_full, quad_full, run_group, thrshd)
sig_level = 0.05
sig_gain_prop[i-1], sig_loss_prop[i-1] = calcSigProp(beta, sig_level)