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SparseSignal

oxiphysics_core::compressed_sensing

Struct SparseSignal 

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pub struct SparseSignal;
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Utility for generating and manipulating synthetic sparse signals.

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impl SparseSignal

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pub fn generate(n: usize, k: usize, amplitude: f64) -> Vec<f64>

Generate a k-sparse signal of length n with random support and values.

Non-zero coefficients are drawn uniformly from [-amplitude, amplitude].

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pub fn add_noise(signal: &[f64], sigma: f64) -> Vec<f64>

Add Gaussian noise with standard deviation sigma to a signal.

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pub fn support_error(truth: &[f64], recovered: &[f64], threshold: f64) -> f64

Compute the support error between two signals (fraction of mismatched support).

A value of 0 means the non-zero patterns are identical.

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pub fn relative_error(truth: &[f64], recovered: &[f64]) -> f64

Compute the relative reconstruction error ||x - x_hat||_2 / ||x||_2.

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