The crystal ball is sooooo foggy today. We need to read your mind, or at least see magically into your computer, because we do not see your code. I tried, really, I did, but that blasted crystal ball just keeps telling me that I will soon inherit some money. Or maybe it is telling me that my descendents will soon inherit some money. Drat. I hope it is the former case.
Seriously, we cannot know what your code is doing wrong without seeing your code. It sounds like you wrote a function called factorial. And of course, MATLAB sees that first, before it sees the regular function of that name. But without seeing what you wrote, how can we know?
Anyway one thing you do NOT want to do is write functions with names that overload the names of existing functions. If you do that, then you will see all sorts of bugs happening. so calling your function factorial was just a bad idea.
