02-02-2007
I don't disagree with anything you have said, however...
Quote:
Originally Posted by sb008
Based on the fact that was stated that the format of the files is:
filename<date>.dat
the regular expression would be strict enough, since it's fair to assume that whatever program produces these output files produces them with a valid date in the file name.
If you're going to assume that whatever program produces these output files produces them with a valid date in the file name, 1) you've made your regular expression unnecessarily strict; that is, you could have just as easily used filename[0-9][0-9][0-9][0-9][0-9][0-9].dat (although less reasonable, it's certainly easier to type), and 2) you're assuming the original poster's request is irrelevant, since his requirement was to "match the filenames like so, ls filename[01-12][01-31][00-99].dat thus guaranteeing [his] date format".
Quote:
Originally Posted by sb008
If other files are around with a similar format, your regular expression, even though it's more strict, would be as useless as mine. Unless ofcourse you promote the filosophy that a statement is better if it has a smaller chance on producing errors.
In most cases here on unix.com, I do promote that philosophy.
Quote:
Originally Posted by sb008
The only valid option, if files with similar patterns are around, is to isolate the date part from the filename and use e.g. a date conversion command/tool on that pattern and test for the return code.
I agree, and that is something I have considered. However, I don't know of one offhand, and although I could write one, unless you can suggest an existing one to me, I can not offer it.
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SDPA(1) General Commands Manual SDPA(1)
NAME
SDPA - High-performance software package for SemiDefinite Programs
SYNOPSIS
sdpa DataFile OutputFile [InitialPtFile] [-pt parameters] [-dimacs] [-numThreads numThreads]
sdpa [options] files...
sdpa --version
DESCRIPTION
sdpa - "SDPA (SemiDefinite Programming Algorithm)" is one of the most efficient and stable software packages for solving SDPs based on the
primal-dual interior-point method.
SDP (SemiDefinite Program) is used for financial engineering, machine learning, control theory, sensor network problem, quantum chemistry,
quantum information, combinatorial optimizaiton, polynomial optimization, and so on.
Futher information on SDP and SDPA can be found at
http://sdpa.sourceforge.net/
OPTIONS
---- option type 1 ----
sdpa DataFile OutputFile [InitialPtFile] [-pt parameters] [-dimacs] [-numThreads numThreads]
parameters = 0 default, 1 fast (unstable), 2 slow (stable)
example1-1: sdpa example1.dat example1.result
example1-2: sdpa example1.dat-s example1.result
example1-3: sdpa example1.dat example1.result example1.ini
example1-4: sdpa example1.dat example1.result -pt 2
example1-5: sdpa example1.dat example1.result -dimacs
example1-6: sdpa example1.dat example1.result -numThreads 4
---- option type 2 ----
sdpa [option filename]+
-dd : data dense :: -ds : data sparse
-id : init dense :: -is : init sparse
-o : output :: -p : parameter
-pt : parameters , 0 default, 1 fast (unstable)
2 slow (stable)
example2-1: sdpa -o example1.result -dd example1.dat
example2-2: sdpa -ds example1.dat-s -o example1.result -p param.sdpa
example2-3: sdpa -ds example1.dat-s -o example1.result -pt 2
example2-4: sdpa -ds example1.dat-s -o example1.result -dimacs
example2-5: sdpa -ds example1.dat-s -o example1.result -numThreads 4
---- option type 3 ----
sdpa --version
to print out version and exit.
PARAMETER_FILE
is decided by the following priority
1: The file assigned by '-p' option of 'option type 2'.
For 'option type1', this is skipped.
2: ./param.sdpa
For 'option type2', this is skipped.
3: /usr/share/sdpa/param.sdpa
4: Default parameter
-dimacs
printout dimacs information incurring additional computation cost
-numThreads
number of pthreads for internal computation
AUTHOR
SDPA was written by SDPA Project <sdpa-developers@lists.sourceforge.net>.
This manual page was written by Makoto Yamashita <Makoto.Yamashita@is.titech.ac.jp>.
July 28, 2011 SDPA(1)