L36, L64 and L64B at http://www.york.ac.uk/depts/maths/tables/taguchi_table.htm

[Nam-Ky Nguyen]

Dear Peter,

Thanks for the confirmation that the orthogonal arrays L36, L64 and L64B
at your website http://www.york.ac.uk/depts/maths/tables/taguchi_table.htm
are NOT orthogonal and your suggestion that I should contact the people
who gave you these arrays. I have already reached 55 and am thinking of
retirement as well so I won't rush into this either. I, however happy to
cc copy of this email to my colleagues at anzstat at lists.uq.edu.au and
developers at designtheory.org so that they can avoid using the mentioned
arrays at your site.

Cheers,
Nam Nguyen
> Thanks for that. I may look into the matter some time, but since I am now
> retired I will not rush into it. You may care to inform the perople
> responsible for the site from which I took the information in the first
> place.
>
> Peter M Lee
>
>
> On Mar 15 2006, Nam-Ky Nguyen wrote:
>
>> Thank you for your quick reply. In addition to the L36 at your webpage,
>> I
>> found that the L64 and L64B at your website also contain several
>> non-orthogonal columns (i.e. these arrays are not OAs). Attached are 3
>> files showing the non-orthogonal pairs in the mentioned arrays. NKN.
>> > The page in question was taken from
>> >
>> > ftp://ftp.nist.gov/pub/dataplot/other/reference/
>> >
>> > and a copy of the page as there is attached - Peter M Lee
>> >
>> >
>> > On Mar 15 2006, Gustav Delius wrote:
>> >
>> >> ---------- Forwarded message ----------
>> >> From: Nam-Ky Nguyen <nkn at turing.une.edu.au>
>> >> Date: Mar 15, 2006 1:26 AM
>> >> Subject: http://www.york.ac.uk/depts/maths/tables/l36.htm
>> >> To: gwd2 at york.ac.uk
>> >>
>> >>
>> >> Sir/Madam,
>> >>
>> >> I have difficulty with the L36 in the above webpage. Several columns
>> >> of this array are not orthogonal to each other. Do you take this
>> array
>> >> from Taguchi's TAGUCHI, SYS. OF EXP. DES.?
>> >>
>> >> Regards, -- Nam-Ky Nguyen Ph.D., Senior Lecturer School of
>> Mathematics,
>> >> Statistics and Computer Science University of New England, Armidale
>> NSW
>> >> 2351 Australia email: nkn at turing.une.edu.au (or
>> nkn at designcomputing.net
>> >> for personal mails) web: http://turing.une.edu.au/~nkn/ Tel: +612
>> 6773
>> >> 2763 (Mobile: 0400024061) Fax: +612 6773 3312
>> >>
>> >>
>> >> --
>> >> Dr Gustav W Delius, Department of Mathematics
>> >> University of York, York YO10 5DD, United Kingdom
>> >> Tel.: +44 (1904) 433 077, Fax.: +44 (1904) 433 071, office: G/110
>> >>
>> >>
>> >
>> > --
>> >    00 O O o o...
>> >   0     ____  _______________ ______________________ _________________
>> >  ][_n_i_|( |_ |             | |  6 Arncliffe Mews  | |     pml1      |
>> > (  _    | ||| | Peter M Lee | |    Alma Terrace    | |  @york.ac.uk  |
>> > _||_|___|_|||_|_____________|_|___York__YO10_4EL___|_|+44_1904_654200|
>> >   o   0--0      o    o    o      o-o          o-o       o    o    o
>> > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>> >
>>
>>
>> -- Nam-Ky Nguyen Ph.D., Senior Lecturer School of Mathematics,
>> Statistics and Computer Science University of New England, Armidale NSW
>> 2351 Australia email: nkn at turing.une.edu.au (or nkn at designcomputing.net
>> for personal mails) web: http://turing.une.edu.au/~nkn/ Tel: +612 6773
>> 2763 (Mobile: 0400024061) Fax: +612 6773 3312
>
> --
>    00 O O o o...
>   0     ____  _______________ ______________________ _________________
>  ][_n_i_|( |_ |             | |  6 Arncliffe Mews  | |     pml1      |
> (  _    | ||| | Peter M Lee | |    Alma Terrace    | |  @york.ac.uk  |
> _||_|___|_|||_|_____________|_|___York__YO10_4EL___|_|+44_1904_654200|
>   o   0--0      o    o    o      o-o          o-o       o    o    o
> +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>


-- 
Nam-Ky Nguyen Ph.D., Senior Lecturer
School of Mathematics, Statistics and Computer Science
University of New England, Armidale NSW 2351 Australia
email: nkn at turing.une.edu.au (or nkn at designcomputing.net for personal mails)
web:   http://turing.une.edu.au/~nkn/
Tel: +612 6773 2763 (Mobile: 0400024061)
Fax: +612 6773 3312