#4 ValueError: math domain error

[Anonymous]

Originally created by: christian.ledermann (code.google.com)

What steps will reproduce the problem?

it fails with this text:

u'EAP: Threatened Marine Ecosystems Get Boost from USD 4.5 Million Grant from the GEF\n\nThe World Bank\u2019s Board of Executive Directors today approved a project to support the Capturing Coral Reef and Related Ecosystem Services Project, with USD 4.5 million in grant funding provided by the Global Environment Facility (GEF). This regional project will design innovative models for valuing mangrove, sea grass and coral reef ecosystems services to inform policy and decision making for improved environmental stewardship of these critical resources.\n\nThe project focuses on Indonesia and the Philippines, where coral reefs and related ecosystem services are critical to livelihoods, food security and climate resilience, and includes activities to: quantify the value and market potential of coral reef and mangrove ecosystem services; forge community-led innovation in capturing and sustaining benefits from marine eco-system services and enhancing resilience in the face of climate change; and promote behavior change through outreach and widely disseminate scientific information to inform policy- and decision-making.\n\nCoastal and marine resources and their associated ecosystem services in the region are linked to globally important marine biodiversity and underpin an enormous part of the regional economy.\n\n\u201cCapturing the economic and cultural values of marine natural capital through the valuation of ecosystem services, and quantifying the cost of lost services due to environmental degradation, has enormous potential. We can transform the development and stewardship of coastal areas by translating ecological value into financial terms for local stakeholders and policy makers,\u201d said Marea Hatziolos, Senior Environmental Specialist and the World Bank\u2019s team leader for the project.\n\n\u201cThis wealth of natural capital has the potential to be a major driver of inclusive green growth in the region, if we overcome some huge challenges. We especially need better resource governance regimes, measures to adequately value the environment for current and future generations when calculating economic benefits, and good scientific information to inform decision making and tradeoffs,\u201d she added.\n\nThe world\u2019s biodiversity epicenter lies within the Coral Triangle \u2013 an area that extends from the northern Philippines to Malaysia in the west, East Timor to the South, Eastern Indonesia and Papua New Guinea to the East and trailing off to the Solomon Islands toward the Southeast. Here, coral reefs are most abundant and diverse and support large populations of people who are highly dependent on coral reef fisheries for the livelihoods and food security. In the Western and Central Pacific, healthy coral reefs and mangroves form the first critical line of defense against storm surge and sea-level rise for low lying islands and atolls.\n\nThe GEF grant will be administered by the Global Change Institute of the University of Queensland.\n\nThe University is contributing USD 2 million in additional financing and research partners will provide another USD 3.9 million in contributions. An additional $21.9 million in parallel co-financing is provided by World Bank-financed projects: the Coral Reef Rehabilitation and Management Program-Coral Triangle Initiative (COREMAP-CTI) in Indonesia and the Rural Development Project in the Philippines.\n'

What is the expected output? What do you see instead?

Traceback (most recent call last):
  File "Entropy.py", line 18, in <module>
    H.AnalyseText()
  File "/home/ledermac/devel/mongo/entropy-calculator/EntropyCalculator.py", line 123, in AnalyseText
    self.RankedWords=[(self.Entropy(word),word) for word in self.unique]
  File "/home/ledermac/devel/mongo/entropy-calculator/EntropyCalculator.py", line 72, in Entropy
    result=self.AnalyticEntropy(n)-H
  File "/home/ledermac/devel/mongo/entropy-calculator/EntropyCalculator.py", line 59, in AnalyticEntropy
    result-=self.MarginalProb(m,n)*x*log(x,2)
  File "/home/ledermac/devel/mongo/entropy-calculator/EntropyCalculator.py", line 46, in MarginalProb
    result=LogCombinations(n,m)
  File "/home/ledermac/devel/mongo/entropy-calculator/EntropyCalculator.py", line 16, in LogCombinations
    result-=lgamma(x-y+1)
ValueError: math domain error

What version of the product are you using? On what operating system?
svn trunk, Python 2.7.2, linux

Please provide any additional information below.

[Anonymous]

Originally posted by: christian.ledermann (code.google.com)

Ah OK I get it I have to play around with the set_words_per_part parameter for smaller texts