Error message in Non-linear fit for more than three variables

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MOHAMED ABDULAZIM
MOHAMED ABDULAZIM el 11 de Ag. de 2020
Comentada: MOHAMED ABDULAZIM el 14 de Ag. de 2020
% Create an anonymous function that describes the expected relationship
% between X and Y
fun = @(b,X) b(1)*X(:,1) + b(2)*X(:,2) + b(3) * exp(b(4)*X(:,3));
% Create a data set to use for our example
% Specify beta
b = [100; 200; 3; 4];
% Create some X variables
X = rand(100,3);
% Y = fun(X)
Y = fun(b,X) + randn(100,1);
% Specify a vector of starting conditions for the solvers
b0 = [75; 300; 1; 8];
% Perform a nonlinear regression
beta = nlinfit(X,Y, fun, b0);
When I run the following script for non-linear fit ,I get this error message (Error in nlinfit (line 14) beta = nlinfit(X,Y, fun, b0);
Are there any syntax errors in the following code?
  5 comentarios
Walter Roberson
Walter Roberson el 12 de Ag. de 2020
You named the file of code nlinfit.m and that is interfering with calling the Statistics Toolbox nlinfit() function. You need to rename your own script to something else.
MOHAMED ABDULAZIM
MOHAMED ABDULAZIM el 14 de Ag. de 2020
Thank you very much ,Walter Roberson.

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