> Just thought that I would let you know that I did try 10-4 but still got
> different answers. I did, however, find that both versions 4.3.9-0 and
> 4.3.9-10 (the only other two versions that I tried) both gave me the
> same results that you obtained each time I ran my data. So I will use those
> versions for my project. Just thought I would let you know in case this
> information will help Joe Ramsey. Thank you very much for all of your help
> and for the quick response.

> On Tuesday, August 21, 2012 6:48:04 PM UTC-5, Clark Glymour wrote:

>> Hello,

>> I have reproduced your results. There was an algorithmic change in 10-6
>> and 10-7 to
>> speed up PC search and it seems to have introduced some sort of
>> instability and
>> therefore unreliability. Joe Ramsey will have to track it down, which
>> will take a
>> few days since he is on vacation.

>> Meanwhile, 10-4 is the "stable" version given on the download site. I
>> have run your
>> data on it and the result is always the same, with 8 directed acyclic
>> graph
>> possibilities at alpha = .05. I attach the 10-4 tetrad session--to run it
>> you will
>> need to download 10-4.

>> Sorry for the problem, but our thanks to you for finding it.

>> Clark Glymour

>> > I have attached the text file with my matrix in it. I am using version
>> > 4.3.10-6. I am running TETRAD on a PC.
>> > It is only when I close out of TETRAD and launch it again that I am
>> getting
>> > different graphs and DAGs.

>> > Thanks for all the help.

>> > On Tuesday, August 21, 2012 1:18:58 PM UTC-5, Clark Glymour wrote:

>> >> Ok, thanks. Send us your data file and what version of TETRAD you are
>> >> using and what
>> >> kind of machine (PC or MAC) you are running it on, please.

>> >> Cg

>> >> > I tried the 'DAGs in Pattern' tab and the number of patterns
>> >> > varies everytime I put my same matrix into TETRAD. I launch TETRAD
>> >> directly
>> >> > from the website each time I use it. I have gotten 1 of 1 patterns,
>> 1 of
>> >> 8
>> >> > patterns, 1 of 10, 1 of 24, even 1 of 40. The number of bidirected
>> edges
>> >> > seems to be changing each time I put my matrix into TETRAD. Is there
>> >> > anything else that I might be able to do differently? Thanks very
>> much
>> >> for
>> >> > the help.

>> >> > On Monday, August 20, 2012 7:36:38 PM UTC-5, Clark Glymour wrote:

>> >> >> Have you looked at the 'DAGS in Pattern' tab? It lists all the
>> >> equivalent
>> >> >> DAGS for
>> >> >> your data at the specified alpha level--in your case .05. My bet is
>> >> that
>> >> >> there are 8
>> >> >> of them.

>> >> >> Cg

>> >> >> > Using TETRAD IV, I get 1 of 8 different graphs every time I run
>> the
>> >> >> > application using PC algorithm at 5% level. I am using the exact
>> same
>> >> >> > covariance matrix to generate the graphs. What could be causing
>> this?