MATLAB: Operator notation for fitlme function

Question

Hi,

Can someone explain the difference between the operators *, | and : in specifying the equation used with the fitlme function?

For example, I have the equation:

lme54=fitlme(tbla5,'alpha_5~Load+Zone+(1+Zone|Term)')

to model alpha_5 as a function of Load, Zone and Term using the data in tbla5.

However, if I replace the | with a : I get different results (and no random effects).

I'd be grateful for any advice concerning the meaning of the different operators as I can't find any information in the manual.

Many thanks, Rebecca

Answer 1

Take a look at the "More About" section in the documentation for fitlme. This includes a section describing the meaning of each of the pieces of notation you can use to define a formula.