def METHOD_NAME(self, key="", **kwargs):
    """Specifies the part of a complex variable to display.
    APDL Command: PLCPLX
    Parameters
    ----------
    key
        Complex variable part:
        0 - Amplitude.
        1 - Phase angle.
        2 - Real part.
        3 - Imaginary part.
    Notes
    -----
    Used only with harmonic analyses (ANTYPE,HARMIC).
    All results data are stored in the form of real and imaginary
    components and converted to amplitude and/or phase angle as specified
    via the PLCPLX command. The conversion is not  valid for derived
    results (such as principal stress/strain, equivalent stress/strain and
    USUM).
    """
    command = f"PLCPLX,{key}"
    return self.run(command, **kwargs)