Re: [UrbanSim-Users] land price estimation and RPy

Brian,

Just a ps to Travis's answer -- there is a complete list of all
changes to the Opus/UrbanSim code on the trac timeline:
http://trondheim.cs.washington.edu/cgi-bin/trac.cgi/timeline
This may be more detail than you want though!

The release notes http://www.urbansim.org/docs/installation/
release_notes.html are intended to describe the major user-visible
changes. (For example, that SQLAlchemy is now a required package is
in there - we should have had a note there about
opus_core.store.ScenarioDatabase as well, and we'll add that.)

    cheers,
    Alan

On Oct 5, 2007, at 10:38 AM, Travis Kriplean wrote:

> Brian,
>
> This is true and is my fault. Could you please send me your
> configuration? I can make sure that it is up to date. I will also add
> conversion notes to
> http://www.urbansim.org/docs/installation/release_notes.html.
>
> Thanks,
> Travis
>
> Brian Miles wrote:
>>
>> Hi Travis,
>>
>> Thanks for the pointer. I've installed sqlalchemy. However, it
>> appears
>> that our configuration, which works with build 857, doesn't work with
>> the latest SVN build.
>>
>> Namely, the class opus_core.store.ScenarioDatabase seems to have been
>> unceremoniously deprecated. Do you have a comprehensive changelog
>> that
>> lists classes/methods in the 857 build which have been
>> deprecated/modified in later builds?
>>
>> Thanks,
>>
>> Brian
>>
>> On Oct 4, 2007, at 1:39 PM, Travis Kriplean wrote:
>>
>>> Brian,
>>>
>>> You can see the list at
>>> http://www.urbansim.org/docs/installation/python_packages.html.
>>>
>>> Sqlalchemy is the only new requirement beyond version 857. You
>>> need to
>>> install the beta version 0.4 of sqlalchemy. It is at
>>> http://www.sqlalchemy.org/download.html.
>>>
>>> Cheers,
>>> Travis
>>>
>>> Brian Miles wrote:
>>>> Hi Hana,
>>>> We're currently running version 857 of Opus (from the zip file). I
>>>> pulled down the latest from SVN, but it appears that I am
>>>> missing at
>>>> least one library that the latest version expects:
>>>> File "C:\opusworkspace-svn\opus_core\database_management
>>>> \database_server.py",
>>>> line 17, in ?
>>>> from sqlalchemy.schema import MetaData
>>>> ImportError: No module named sqlalchemy.schema
>>>> Do you have a document that lists all of the libraries required by
>>>> the latest version of Opus?
>>>> Thanks,
>>>> Brian
>>>> On Oct 3, 2007, at 4:50 PM, Hana Sevcikova wrote:
>>>>> Brian,
>>>>>
>>>>> You're right, changing the estimation procedure is not very well
>>>>> supported. I have done some changes today, so please update from
>>>>> SVN. Then you can add an argument
>>>>>
>>>>> estimation_procedure = "opus_core.estimate_linear_regression_r"
>>>>>
>>>>> to the land_price_model controller in urbansim/configs/
>>>>> general_configuration.py (in the
>>>>> LandPriceModelConfigurationCreator
>>>>> call) and the estimation should call that module.
>>>>>
>>>>> We haven't kept code that uses rpy up to date since our conversion
>>>>> to numpy, so yes, the module will be probably broken. But the
>>>>> suggested change should do what I understand you want to do.
>>>>>
>>>>> Let me know if you need this also for other models. We are in the
>>>>> process of changing the system of configurations, so in the future
>>>>> it should be much easier to specify these non-standard settings.
>>>>> Sorry for the inconvenience.
>>>>>
>>>>> Hana
>>>>>
>>>>>
>>>>> Brian Miles wrote:
>>>>>> Hello,
>>>>>> We are trying to configure the land price model to estimate using
>>>>>> RPy so that we can use R's AIC and plotting features.
>>>>>> I see from urbansim.models.LandPriceModel.estimate() that the
>>>>>> default estimation procedure used is that defined in
>>>>>> opus_core.estimate_linear_regression. I see that there exists
>>>>>> another potential land price estimation procedure in
>>>>>> opus_core.estimate_linear_regression_r. In theory, we would use
>>>>>> an estimation procedure something like this one to take advantage
>>>>>> of R's AIC calculation and plot generation.
>>>>>> However, I don't understand how to configure the
>>>>>> urbansim.models.LandPriceModel to use something other than the
>>>>>> default estimation procedure. Taking my cue from the
>>>>>> documentation in opus_core.RegressionModel.estimate(), I tried
>>>>>> adding the key 'estimation' with the value
>>>>>> 'opus_core.estimate_linear_regression_r' to my estimation config.
>>>>>> This doesn't work however, because LandPriceModel (a subclass of
>>>>>> RegressionModel) specifies a procedure, and the logic in
>>>>>> RegressionModel.estimate() only looks to the estimation
>>>>>> configuration for the estimation procedure if there is no
>>>>>> estimate
>>>>>> procedure specified.
>>>>>> I temporarily--for testing purposes--modified
>>>>>> RegressionModel.estimate() to look first to the config. However
>>>>>> the things I'm setting in my estimation config (e.g. estimation,
>>>>>> cache_directory) aren't in the estimation config that
>>>>>> RegressionModel.estimate() is seeing.
>>>>>> I'm unsure of what the best way is to do what I'm trying to do
>>>>>> (specify an estimation procedure other than that which is hard
>>>>>> coded in LandPriceModel.estimate()).
>>>>>> I may not be properly specifying the estimation procedure that I
>>>>>> have to run; how should this be done? (I didn't see any specific
>>>>>> advise on this in the Opus user guide.) Or perhaps I should copy
>>>>>> the LandPriceModel into a models directory within my own package
>>>>>> and modify that? (note: I modified
>>>>>> urbansim.models.LandPriceModel,
>>>>>> as a test, to run opus_core.estimate_linear_regression_r, and it
>>>>>> did, only this estimation procedure appears to be broken.
>>>>>> However, this is a moot point until I have an
>>>>>> acceptable/"correct"
>>>>>> way of specifying estimation procedures to models).
>>>>>> Whether one of these or something else, what's the best way to
>>>>>> proceed?
>>>>>> Thanks,
>>>>>> Brian Miles
>>>>>> Graduate Assistant
>>>>>> Spatial Analysis Lab - Rubenstein School of Environment and
>>>>>> Natural Resources
>>>>>> University of Vermont
>>>>>> -----------------------------------------------------------------
>>>>>> ----
>>>>>> ---
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Received on Fri Oct 05 2007 - 13:55:57 PDT