[Wien] Optical graph of spin polarized system

[Junaid Munir]

Dear all,
I am doing spin polarized calculation of a half metal compound. My question is
For optical properties, when we do step addjoint-updn_lapw what does it means? Does it combine the plot for both spin-up and spin-down?  Can we represent the plot of real and imaginary parts for spin-up and spin-down separately? Or one plot which we get includes both spin-up and down? 
Regards,Junaid
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