[Pw_forum] calculating lambda for a phonon band structure with imaginary frequencies

[Guoying Gao]

Dear everyone,
      I intend to do the electron-phonon coupling calculation.
However, I found some  imaginary frequencies in the phonon band
structure.
So is it reasonable to calculate the lambda for the qpoints with
imaginary frequencies and why?
Thanks very much!
Guoying
National Lab of Superhard Materials, JiLin Univ, P. R. China