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Surpan

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10 nopember technology Institute

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11 Mar 2013 LMFnlsq - Solution of nonlinear least squares Efficient and stable Levenberg-Marquard-Fletcher method for solving of nonlinear equations Author: Miroslav Balda

@prof misrolav balda
here is my question in mathlab answer
http://www.mathworks.com/matlabcentral/answers/65291-imaginary-value-from-solution-nonlinier-least-square
check it there please

11 Mar 2013 LMFnlsq - Solution of nonlinear least squares Efficient and stable Levenberg-Marquard-Fletcher method for solving of nonlinear equations Author: Miroslav Balda

@ prof Misrolav Balda
actually my data consist from so many wavelength but this i give you from two wavelength
for 690nm
F = [0.779543143 0.624771688 0.387776261 0.266986051 0.174732672 0.130313689 0.110540421 0.051412959]

a is in range = 0.09 - 0.8
b is in range = 7 - 15

for c = [0.8 0.9 1 1.1 1.2 1.3 1.4 1.6]

i always get the imaginary solution with your code, please help me

28 Feb 2013 LMFnlsq - Solution of nonlinear least squares Efficient and stable Levenberg-Marquard-Fletcher method for solving of nonlinear equations Author: Miroslav Balda

hi
im trying to contcat you by email because i need to solve my case so i ended up here

i have function with 2 parameter, like this
F = (0.6/(a + b))*(sqrt(3*a*(a + b))+(1/c))*(exp(-sqrt(3*a*(a + b ))*c))/(c^2)

F is known reflectance data
a and b is parameter
c is known vector distance

can i use LMFnlsq to solve that with lavenberg marquardt algorithm? im tring to use that code but the solution give me imaginary a and b

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