Patch to qp() to support extra arg specifying maximum iterations

[Ben Abbott]

On Feb 1, 2009, at 8:45 PM, Joshua Redstone wrote:

> On Sun, Feb 1, 2009 at 4:51 PM, Ben Abbott <bpabbott at mac.com> wrote:
>
>> On Feb 1, 2009, at 6:43 PM, Joshua Redstone wrote:
>>
>> Hi,
>> Attached is a patch to eliminate a FIXME in qp.m.  This adds an  
>> extra arg to qp() to specify the maximum number of iterations.
>> The old hard-coded value of 200 iterations is sometimes  
>> insufficient for convergence.
>>
>> I originally posted this 3 months ago, but perhaps sent it to the  
>> wrong list.  I've update the diff to the current repository version.
>> I haven't contributed before, so please let me know if there's  
>> something else I should do.
>> Thanks,
>> Josh
>>
>> <qp.diff>
>>
>> Josh,
>>
>> I'm unfamiliar with qp(). Is it possible to add some tests that  
>> validate this change?
>>
>> Ben
>>
>
> I attached a diff of a followon changeset that adds a few tests to  
> qp.m to exercise the maxit argument.
> I actually don't understand qp.m internals so the examples are  
> pretty contrived.
> Also, I have mercurial 1.0.1 and I couldn't figure out how to  
> generate a single 'export' style patch that included both changesets.
> Josh

I don't know if it is possible to export a patch that includes two  
changesets. What I tend to do is create a changeset for each, and  
import them into a virgin mercurial archive and then produce a  
changeset (I hope that makes sense). The only caveat is that the 2nd  
Changelog entry may not apply, so I edit the Changelog manually and  
then generate a combined changeset.

I expect someone with a better understanding of mercurial will educate  
us sometime tomorrow :-)

Regarding the Changelog, you should add the change to the Changelog  
file in the scripts directory. Thus the changeset should include  
something like what is below ...

--- a/scripts/ChangeLog	Sun Feb 01 20:40:10 2009 +0100
+++ b/scripts/ChangeLog	Sun Feb 01 15:40:19 2009 -0800
@@ -1,3 +1,8 @@
+2009-02-01  Joshua Redstone <redstone at gmail.com>
+
+	* scripts/optimization/qp.m: Add extra argument, max_iter, to qp(),
+	specifying the maximum number of iterations.
+

Ben