parameters estimation for a model

Hi All,
I am facing a trouble to find two parameters, named as a and b, from the following equation
y=0.5*[1.0-erf(log(a*x)/(b*sqrt(2)))]
Can anyone help me in this regard? A data file is attached herewith for your consideration.
Best Sudipta

1 comentario

John D'Errico
John D'Errico el 30 de Dic. de 2014
No file was attached. Try harder.

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Preguntada:

el 30 de Dic. de 2014

Cerrada:

el 20 de Ag. de 2021

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