On May 28, 2011, at 10:58 AM, Chim Kaho wrote:
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.
A fairly common beginner mistake is to install a package but then not
not understand that thye also need to laod it.
?require
?library
--
David Winsemius, MD
West Hartford, CT
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