How to access inbuilt functions?

Question

As what should I be typing in the Command Window to get the function file to open?

Usually I get a link to them when debugging and an error occurs, but what command can be used to access them directly?

Answer 1

edit functionName, e.g. edit repmat.

There are built-in functions that are not written in Matlab, but for these functions you cannot take a look at the code even if an error occurs.