Squeeze sprase DF
@@ -51,7 +51,7 @@ class Convolve(Transformation):
convolved = hrf.compute_regressor(vals, model, onsets,
fir_delays=fir_delays, min_onset=0)
- return pd.DataFrame(convolved[0], index=df.index)
+ return pd.DataFrame(convolved[0], index=df.index).squeeze()
class Demean(Transformation):
