[Kwant] Re: How the spin is positioned in the Smatrix?

[木呆 叶]

hello, I copy your code to run with kwant 1.4.2. But, I get the error 
"IndexError: index 2 is out of bounds for axis 0 with size 2", when calculate 
data_ud.append(smatrix.transmission((1,1), (0,0))) # transmission lead 0 up to 
lead 1 down. Did you meet the same problem？