MATLAB: How to set the iteration limit for the “glmfit” function

Question

How can I set the iteration limit for the "glmfit" function? The default limit is 100 and I get the following warning message after I execute the "glmfit" command:

Warning: Iteration limit reached.

> In glmfit (line 332)

How can I increase this limit to 1000?

Answer 1

You can use the "statset" function to define the options to be used in "glmfit". Iteration limit can be set by the parameter "MaxIter" as follows:

opts = statset('glmfit');
opts.MaxIter = 1000; % default value for glmfit is 100.

Then you can call "glmfit" with this options structure:

This example is taken from the "glmfit" documentation:

https://www.mathworks.com/help/stats/glmfit.html

x = [2100 2300 2500 2700 2900 3100 ...
     3300 3500 3700 3900 4100 4300]';
n = [48 42 31 34 31 21 23 23 21 16 17 21]';
y = [1 2 0 3 8 8 14 17 19 15 17 21]';
b = glmfit(x,[y n],'binomial','link','probit', 'options', opts);

Note that these above steps can also be taken to set different statistics options for a variety of functions available in the Statistics and Machine Learning Toolbox. You can refer to the following documentation for more details about what options can be set using "statset" function:

https://www.mathworks.com/help/stats/statset.html