Units same as ypower. Power spectral density of the noise output. Units same as ypower. Gain spectrum, or modulus of the transfer function. Phase spectrum, or phase of the transfer function.
Units are radians.
If no file is specified, spectrum1d will read from standard input. Cross-spectral error bars are larger and more complicated, being a function also of the coherency. Estimate the optimum f requency response function by least squares, such that the noise output is minimized and the coherent outpu t and the noise output are uncorrelated. Selects binary output.