In Qspice waveform viewer, export .ac or .bode will give you complex data format
Complex data format in Qspice is (real,imag), in regardness of what you select in your axis, it always return (real,imag) in export data.
By the way, standard excel opening cannot handle this type of .csv, as frequency and transfer function data with space as delimiter, but each complex data in format that real,imag, with comma as delimiter.
I write matlab to handle this type of complicated mixed data format and convert it back to dB and phase.
