struct removed_lines{ int index; float fvalue; float re; float im; };The different quantities are:

`index:`The subscript (frequency bin) occupied by the spectral line in an array of length (defined in the previous section). Note that in typical use index runs over a range of possible values, including DC and Nyquist.`fvalue`The value of the F-statistic, defined by Percival and Walden eqn. (499c).`re:`The real part of the line's complex amplitude. The normalization/sign conventions are identical to Percival and Walden eqns (499a) and the example on line 20 of page 513.`im:`The imaginary part of the line's complex amplitude. The normalization conventions are identical to Percival and Walden eqns (499a) and the example on line 20 of page 513, but the sign is reversed, because the Percival and Walden FFT conventions eqn (65ab) are opposite to Numerical Recipes.