Function softplus_scaling 

pub fn softplus_scaling(magnitude: &[f64], offset: f64, factor: f64) -> Vec<f64>

Softplus magnitude scaling for enhanced contrast

Applies a shifted softplus function: softplus(x) - softplus(0) where softplus(x) = (log(1 + exp(-|f*(x-offset)|)) + max(0, f*(x-offset))) / f and f = factor / offset.

Arguments

• magnitude - Input magnitude data
• offset - Softplus offset (controls transition point)
• factor - Steepness factor (default 2.0)

Returns

Scaled magnitude