need help to find the solution of 4d equation

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chetan sharma 2017-7-28

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编辑： chetan sharma 2017-7-28

I want to find the parameters of Kappa distribution (4 parameters, i.e. tsi, alpha, k, h) using known L-moments.i.e., tau, tau3 and tau4. Kindly help me to get the solution.

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>>I have tau= lambda2/lamda1, so I will have three equations, i.e. one from eq.A.98/A.97, second from A.99 and third from A.100. I have to solve 3 equations to get four parameters, i.e., tsi, alpha, k, h

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Answer 1

Torsten 2017-7-28

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Try "fsolve" on the system of equations given by (A97)-A(100).

Best wishes

Torsten.

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chetan sharma 2017-7-28

编辑：chetan sharma 2017-7-28

I tried fsolove but it's giving different answers by changing initial seeds, the parameters are different x0=[1 1 1 1] = 0.464 0.695 -3.165e-15 2.093 or x0=[1 1 1 2] = 0.540 0.870 -6.194e-14 1.291

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