nlinfit Options - how to set them?

I want to change the max iterations for nlinfit, as usual the mathworks docs are totally unhelpful by saying

'[...] = nlinfit(X,y,fun,beta0,options) specifies control parameters for the algorithm used in nlinfit. options is a structure created by a call to statset'

so obvoiusly

cfit = nlinfit(xdata,ydata,f,c, MaxIter=600)

does not work, as I have to make a 'call to statset' whatever that means! It does not explain how to do this or provide an example of how this is done.

So how do I change the Max iterations?

Answer 1

[Matt Tearle]

doc statset

statset is a function that will create a structure variable of options; you then pass this structure into nlinfit:

opts = statset('MaxIter',600);
fit = nlinfit(xdata,ydata,f,c,opts)

opts is the structure variable.

Answer 2

[Robert Cumming]

You need to put it as a field in a structure:

options.MaxIter = 600

cfit = nlinfit(xdata,ydata,f,c, options)

see help nlinfit for list of options.

Answer 3

[Dave]

Before your call to 'nlinfit' do this: options = statset('nlinfit'); options.MaxIter = 1000;