Enquiry on Vrtest

Hi there,

I am currently working on my dissertation which is about testing the
martingale hypothesis in the stock market using a methodology  
involving a
range of variance ratio tests and multiple variance ratio tests. I  
contacted
the author of a reference paper and I was told that the tests can be
conducted using R programming language. Although I have gone through  
the
theoretical background of the methodology, but I found it quite  
difficult to
implement the tests practically using my own data. As I have little
experience in R.

I would be really appreciated if you could do me a favour by giving  
me some
hints on to use the Reference Manual written by the author of  
Vrtest, is it
correct for me to read in my own data, and then type in the codes  
from the
reference manual to get results.Obviously, I have installed the Vrtest
package. I tried to type in the command from the reference manual  
and they
always return "Error: could not find function", I would like to know  
how to
solve this. Many thanks.