# A numerical method of fitting a multiparameter nonlinear function to experimental data in the ${L}_{1}$ norm

Aplikace matematiky (1988)

- Volume: 33, Issue: 3, page 161-170
- ISSN: 0862-7940

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topJakeš, Jaromír. "A numerical method of fitting a multiparameter nonlinear function to experimental data in the $L_1$ norm." Aplikace matematiky 33.3 (1988): 161-170. <http://eudml.org/doc/15534>.

@article{Jakeš1988,

abstract = {A numerical method of fitting a multiparameter function, non-linear in the parameters which are to be estimated, to the experimental data in the $L_1$ norm (i.e., by minimizing the sum of absolute values of errors of the experimental data) has been developed. This method starts with the least squares solution for the function and then minimizes the expression $\sum _i (x^2_i + a^2)^\{1/2\}$, where $x_i$ is the error of the $i$-th experimental datum, starting with an $a$ comparable with the root-mean-square error of the least squares solution and then decreasing it gradually to a negligibly small value, which yields the desired solution. The solution for each fixed $a$ is searched by using the Hessian matrix. If necessary, a suitable damping of corrections is initially used. Examples are given of an application of the method to the analysis of some data from the field of photon correlation spectroscopy.},

author = {Jakeš, Jaromír},

journal = {Aplikace matematiky},

keywords = {nonlinear function; adjustment of parameters by $L_1$ norm; photon correlation spectroscopy; analysis of experimental data; nonlinear function; adjustment of parameters by norm; photon correlation spectroscopy; analysis of experimental data},

language = {eng},

number = {3},

pages = {161-170},

publisher = {Institute of Mathematics, Academy of Sciences of the Czech Republic},

title = {A numerical method of fitting a multiparameter nonlinear function to experimental data in the $L_1$ norm},

url = {http://eudml.org/doc/15534},

volume = {33},

year = {1988},

}

TY - JOUR

AU - Jakeš, Jaromír

TI - A numerical method of fitting a multiparameter nonlinear function to experimental data in the $L_1$ norm

JO - Aplikace matematiky

PY - 1988

PB - Institute of Mathematics, Academy of Sciences of the Czech Republic

VL - 33

IS - 3

SP - 161

EP - 170

AB - A numerical method of fitting a multiparameter function, non-linear in the parameters which are to be estimated, to the experimental data in the $L_1$ norm (i.e., by minimizing the sum of absolute values of errors of the experimental data) has been developed. This method starts with the least squares solution for the function and then minimizes the expression $\sum _i (x^2_i + a^2)^{1/2}$, where $x_i$ is the error of the $i$-th experimental datum, starting with an $a$ comparable with the root-mean-square error of the least squares solution and then decreasing it gradually to a negligibly small value, which yields the desired solution. The solution for each fixed $a$ is searched by using the Hessian matrix. If necessary, a suitable damping of corrections is initially used. Examples are given of an application of the method to the analysis of some data from the field of photon correlation spectroscopy.

LA - eng

KW - nonlinear function; adjustment of parameters by $L_1$ norm; photon correlation spectroscopy; analysis of experimental data; nonlinear function; adjustment of parameters by norm; photon correlation spectroscopy; analysis of experimental data

UR - http://eudml.org/doc/15534

ER -

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- P. Bloomfield W. L. Steiger, Least Absolute Deviations. Theory, Applications, and Algorithms, Birkhäuser, Boston-Basel-Stuttgart 1983. (1983) Zbl0536.62049MR0748483
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