[R] Multidimensional array with R

[Michael Zak]

Hi there

I know, I'm sure you discussed this stuff 100 times, but I really have  
a basic understanding problem, if and how do I create a  
multidimensional array in R. I'm coming from MATLAB and there it's as  
easy as you ever could imagine.

Ok, so, I want to have an array, where I can fill in data from a Excel  
spreadsheet. The array should be addressed like this:

data["Cacao"]["Open"] or data["Cotton"]["Close"], you get me? Ok,  
that's fine. Otherwise feel free to ask questions. Because I tried to  
build such an array but without success (even with googling)...

Thank you, Michael