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SODE / News: Recent posts

Complicated problem fixed - mtest6

In sample tests the complex problem mtest6 was fixed as mtest6g. see:
http://sode.sf.net/RubySode/improved/results.html

Dennis

Posted by Dennis J. Darland 2007-09-30

Logarithms - Apfp- Greatly improved

RubyApfp07 has truly arbitrary precision logarithms - finally. I had a hard time figuring this out for some reason. RubyApfp07 is used by RubySode07. Also improved norm & naturally sqrt & "**".

Posted by Dennis J. Darland 2007-04-28

Still Alpha release

NOTE: this is still an alpha release. I have fixed some problems that I haven't pulled together yet & still need to fix a few more. Most of the problems are in APFP (but not ureal). They mainly affect performance & memory usage.

Posted by Dennis J. Darland 2006-12-07

Sample problems & solutions

Sample problems & solutions using usode are now on the web page http://sode.sf.net/ They are in the download as well.

Posted by Dennis J. Darland 2006-11-26

usode and apfp

There is a new version of sode -- usode. It uses APFP (a sourceforge project) for floating point.
You can uses either apfp or ureal found there. It is still very new. The latest version of usode is found in cvs. I have decided to make more releases yet. There is a release for APFP as it is more stable. ( I think)

Posted by Dennis J. Darland 2006-11-04

Visit the project web page

http://sode.sf.net

Sample problems & solutions

Posted by Dennis J. Darland 2006-03-12

Next - isolate machine dependences

I intend to add a "machine" section to isolate machine dependences -- such as constants to avoid under/over flow. Any suggestions?

Posted by Dennis J. Darland 2006-03-07

Hint - atomall too

You can do the same thing with atomall.

Posted by Dennis J. Darland 2006-02-12

Hint - Batch files

You can create batch files for your OS to run the Icon or Unicon compilers (redirecting the stdout & stderr to files) This make the easer to look at & see them. The only drawback is that you get no prompt for the problem file name (minus the suffix).

Posted by Dennis J. Darland 2006-02-12

sode33 released

Sode33 was released yeaeterday. Fixing problems having to do with H and input checking (mostly).

Posted by Dennis J. Darland 2006-01-25

sode32 - input checking

sode32, now released, does basic validation on the input data. This occurs when the generated program is run.

Posted by Dennis J. Darland 2006-01-19

sode30-Greatly improved err ctl.

Sode30 is released with much better error control. And a fix for diff's on the RHS.

Posted by Dennis J. Darland 2006-01-09

sode28 and sode29

It turned out that sode28 had a severe bug introduced, and some others not yet fixed. THE bug has been taken care of, & some of the others. These have been checked into cvs. A release 29 will be made soon.

Posted by Dennis J. Darland 2006-01-05

sode28 released

SODE28 with improved singularity handling and a little better step size conrtrol. Also there is a new variable which may be used in the problem file -- look_poles . If set to 1, poles will be looked for. If 0 , the defaullt, they won't be.

Posted by Dennis J. Darland 2006-01-04

Step size control

I'm still working on step size control, mostly with the STIFF hires diffeq. I get overflow or underflow after many iterations. I hope to have this fixed soon.

Posted by Dennis J. Darland 2005-12-31

Web pages updated.

The web pages at http://sode.sourceforge.net have been revised.

Posted by Dennis J. Darland 2005-12-18

Diff's on RHS OK after all

False alarm.

Posted by Dennis J. Darland 2005-12-18

Trouble with diff's on RHS - again.

SORRY -- I'm still working on this.

Posted by Dennis J. Darland 2005-12-16

SODE25 released

Mostly improving step size control. Also making corrections on .ide files.

Posted by Dennis J. Darland 2005-12-16

SODE25 coming soon!

SODE25 will mainly improve the increment handling.

Posted by Dennis J. Darland 2005-12-15

SODE24 released!

Consolidating SODE23 & improving efficiency of atomall.

Posted by Dennis J. Darland 2005-12-15

SODE optimized for atomall.(cvs)

cvs containes an improved version of SODE.icn for atomall. Also The corrected version of sats.txt is in cvs.

Posted by Dennis J. Darland 2005-12-12

fix in sats23... for sode23...

Sats23.zip & sats23.tar.gz contain fixes for sats.txt & sats.icn in sode23.zip & sode23.tar.gz.
You will also want to make the change the change to sats.txt in the prior news message.

Posted by Dennis J. Darland 2005-12-11

small error in sats.txt

in wrk_prod, the "&" should be "and".

Posted by Dennis J. Darland 2005-12-10

Dependent variables fixed - I think

sode23 seemd to fix the trouble if a small enough increment is taken. (adjust_h := 0; if needed). The code the adjust the increment needs examination -- but I had to get the rest right first.

Posted by Dennis J. Darland 2005-12-10