[ibis-interconn] Re: [Sparse Matrix Mapping] Writeup Comments
- From: <radek_biernacki@xxxxxxxxxxx>
- To: <ibis-interconn@xxxxxxxxxxxxx>
- Date: Tue, 17 Nov 2009 20:53:03 -0700
Hi All,
I have the following comments on the Draft 5 revision.
1. The complex value .999 .999 at the top of page 4 (top) is a good example of
the problem with the current rules. We need to provide meaningless data that
are to be ignored just to satisfy our a bit ill-conceived rules. We need to
sort out the issue of [Number Of Sparse Labels], empty labels and the rigid
format of the labels: 1: ... N:
2. Terminology:
Rows and columns (with a reference to the original matrix) - these terms
actually refer to the row and column indices and should be spelled out as "row
index" and "column index", respectively.
Columns (with a reference to the network data) - should be avoided as the
network data is not a matrix, nor it has to be arranged in columns
Larger matrix, full matrix - should be avoided - there is only one matrix
3. I would like to see a keyword like [End Of Sparse Matrix Mapping].
Radek
-----Original Message-----
From: ibis-interconn-bounce@xxxxxxxxxxxxx
[mailto:ibis-interconn-bounce@xxxxxxxxxxxxx] On Behalf Of Bob Ross
Sent: Tuesday, November 17, 2009 4:08 PM
To: IBIS-Interconnect
Subject: [ibis-interconn] [Sparse Matrix Mapping] Writeup Comments
All:
As requested at the last meeting here is a top level review
of the Sparce Matrix Proposal. I am assuming Draft 5 as the
reference, and some issues are listed first. The editing then
will follow.
I agreement with nearly all of the technical content, but a few
details need to be agreed upon, and the list below needs to
be considered for editorial changes.
------------
Specific comments/issues to be resolveed only on the Draft5:
1. Nomenclature: Prefer changing notation to lower case hyphenated
words instead of capitalized two word names:
Integer Labels --> integer-labels
Index Pairs --> index-pairs
Data Pair --> data-pair (actually not fully defined elsewhere)
matrix pair --> data-pair
does data-pair need to be defined?
2. Resolve whether empty integer-labels are permitted
(this impact editing several rules and the examples.)
(I am not sure we agreed on "No".)
3. Do we need [Number of Sparse Labels] ?
Technically No, but for redundancy, cross checking, Yes.
Must it appear before [Sparse Matrix Mapping]?
No, can be an after-the-fact check with the maximum
integer-label value.
4. Is there a better way to indicate "zero-valued" as in
"Data in the full matrix that is not indicated by a matrix
pair under [Sparse Matrix Mapping] is assumed zero-valued."
(in DB format 0 0 (zero-valued) means the magnitude in MA is "1"
and phase is 0 degrees.)
5. The formatting of the fundamental definitions (syntactical
definition and then brief description). Put other rules elsewhere,
and we did define "n" earlier:
integer-label: An integer between 1 and less than or equal to n^2
and without any space by a colon character. For example: '5:'.
Integer-labels refer to the data-pair column under the
[Network Data] keyword where data-pairs are entered for
each frequency.
index-pair: A pair of positive integers between 1 and n, separated
without any space by the comma character and enclosed
without space by the open-parenthesis and closed-parenthesis
characters. For example: '(3,5)'. Index-pairs refers
to the n-port row,column position where the specified data-pair
value exists in the fully populated n-port without the [Sparse
Matrix Mapping] keyword.
Rules for integer-labels and index-pairs (separate heading or just
the following paragraphs):
sequencing, white-space, must be followed by one or more index-pair,
maximum value of index-pair, cannot be repeated, highest index-pair
match [Number of Sparse Labels], multiple lines, multiple labels on
same line, etc.
This format matches better the format in the rest of Touchstone V.2
6. More discussion regarding the special interpretation of
[Matrix Format] Full | Upper | Lower
Position of [Matrix Format] before [Sparse Matrix Mapping]? - Yes
-----------------------------------------
Bigger issues to be resolve later when this writeup is merged into
Touchstone 2.0 - analogous to a BIRD and then its merger and interaction
into the main document later.
1. Where in document (after what keyword) or a new chapter?
2. Addition to [Matrix Format] number of entries rule.
3. Example re-numbering and Example format.
4. Other interacitons - e.g., page 3. for list of keywords.
5. Designation/distinction of Touchstone 2.0 2.1 or just 2.X for
all versions and growth. Or does this become Touchstone 3.0?
------------------
Bob
--
Bob Ross
Teraspeed Consulting Group LLC Teraspeed Labs
121 North River Drive 13610 SW Harness Lane
Narragansett, RI 02882 Beaverton, OR 97008
401-284-1827 503-430-1065
http://www.teraspeed.com 503-246-8048 Direct
bob@xxxxxxxxxxxxx
Teraspeed is a registered service mark of Teraspeed Consulting Group LLC
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