Dear users
I have an fMRI dataset comprising 113 volumes (from a single run). I would like
to map information about events during the fMRI run - experimental condition
and onset time - to the dataset. The events structure is stored in a .txt file
with four columns: run#, experimental condition, unique stimulus, and onset
time. It looks something like this
0 Y porch 12.030224
0 Y victory 15.530834
0 P kingdom 19.031396
0 Y evening 22.531978
I've tried to map this info to the fMRI dataset in the following way:
bold_fname = 'path_to_fMRI_dataset'
exp_data = pd.read_csv("path_to_txt", delimiter='\t', header = None)
exp_data.columns = ['run','condition','word','onset']
ds = fmri_dataset(bold_fname, targets = None)
ds.sa.time_coords = exp_data.onset
ds.sa.targets = exp_data.condition
The problem with this is that there are more fMRI volumes than rows in the
conditions.txt fie, hence I get the following error:
Name: onset, dtype: float64` (Value length [45] does not match the required
length [113] of attribute 'time_coords'.)
Can anyone suggest a workaround? Thanks in advance for any advice!
---------------------------------------------------------
Lyam Bailey, B.Sc., M.Sc.
Doctoral Student
Department of Psychology & Neuroscience
Dalhousie University
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