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sig4inv.m 114 B

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  1. function x=sig4inv(beta,y)
  2. %% sig4
  3. y0=beta(1);
  4. a=beta(2);
  5. x0=beta(3);
  6. b=beta(4);
  7. x = -b*log((a./(y-y0))-1)+x0;