## sigm_fit

Versión 1.5.0.0 (4,11 KB) por
Optimization of parameters of the sigmoid function
7,8K descargas

Ver licencia

Optimization of parameters of the sigmoid function

Syntax:
[param]=sigm_fit(x,y)

that is the same that
[param]=sigm_fit(x,y,[],[],[]) % no fixed_params, automatic initial_params

[param]=sigm_fit(x,y,fixed_params) % automatic initial_params
[param]=sigm_fit(x,y,[],initial_params) % use it when the estimation is poor
[param]=sigm_fit(x,y,fixed_params,initial_params,plot_flag)

param = [min, max, x50, slope]

if fixed_params=[NaN, NaN , NaN , NaN] % or fixed_params=[]
optimization of "min", "max", "x50" and "slope" (default)

if fixed_params=[0, 1 , NaN , NaN]
optimization of x50 and slope of a sigmoid of ranging from 0 to 1

Additional information in the second output, STAT
[param,stat]=sigm_fit(x,y,fixed_params,initial_params,plot_flag)

Example:
%% generate data vectors (x and y)
fsigm = @(param,xval) param(1)+(param(2)-param(1))./(1+10.^((param(3)-xval)*param(4)))
param=[0 1 5 1]; % "min", "max", "x50", "slope"
x=0:0.1:10;
y=fsigm(param,x) + 0.1*randn(size(x));

%% standard parameter estimation
[estimated_params]=sigm_fit(x,y)

%% parameter estimation with forced 0.5 fixed min
[estimated_params]=sigm_fit(x,y,[0.5 NaN NaN NaN])

%% parameter estimation without plotting
[estimated_params]=sigm_fit(x,y,[],[],0)

### Citar como

R P (2024). sigm_fit (https://www.mathworks.com/matlabcentral/fileexchange/42641-sigm_fit), MATLAB Central File Exchange. Recuperado .

##### Compatibilidad con la versión de MATLAB
Se creó con R13
Compatible con cualquier versión
Windows macOS Linux
##### Categorías
Más información sobre Curve Fitting Toolbox en Help Center y MATLAB Answers.

Inspiración para: sigmoid, sigm_fit_val(param,x)

### Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!
Versión Publicado Notas de la versión
1.5.0.0

plot bug fixed
title update

1.4.0.0

minmax function used in plotting substituted by min and max functions

1.3.0.0

STAT output variable, with confidence intervals for parameters and distribution

1.0.0.0