Module nlt

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Functions

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funk(p, x, y)
Function misfit evaluation for best-fit tanh curve...

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compare(a, b)
Compare items in 2 arrays.

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TRM(f, a, b)
Calculate TRM using tanh relationship...

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TRMinv(m, a, b)

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NRM(f, a, b, best)

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NLtrm(Bs, TRMs, best, blab, jackknife)

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Function Details

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funk(p, x, y)

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Function misfit evaluation for best-fit tanh curve
f(x[:]) = alpha*tanh(beta*x[:])
    alpha = params[0]
    beta = params[1]
funk(params) = sqrt(sum((y[:] - f(x[:]))**2)/len(y[:]))
Output is RMS misfit
  x=xx[0][:]
  y=xx[1][:]q

compare(a, b)

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Compare items in 2 arrays. Returns sum(abs(a(i)-b(i)))

TRM(f, a, b)

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Calculate TRM using tanh relationship
 TRM(f)=a*math.tanh(b*f)