Matlab code of a function used in S2 File.
<div><p>Working groups for integrated ecosystem assessments are often challenged with understanding and assessing recent change in ecosystems. As a basis for this, the groups typically have at their disposal many time series and will often need to prioritize which ones to follow up for c...
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2024
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| _version_ | 1852026448041213952 |
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| author | Hiroko Kato Solvang (5718250) |
| author2 | Per Arneberg (11964800) |
| author2_role | author |
| author_facet | Hiroko Kato Solvang (5718250) Per Arneberg (11964800) |
| author_role | author |
| dc.creator.none.fl_str_mv | Hiroko Kato Solvang (5718250) Per Arneberg (11964800) |
| dc.date.none.fl_str_mv | 2024-09-23T17:28:21Z |
| dc.identifier.none.fl_str_mv | 10.1371/journal.pone.0305716.s006 |
| dc.relation.none.fl_str_mv | https://figshare.com/articles/dataset/Matlab_code_of_a_function_used_in_S2_File_/27090231 |
| dc.rights.none.fl_str_mv | CC BY 4.0 info:eu-repo/semantics/openAccess |
| dc.subject.none.fl_str_mv | Biochemistry Medicine Biotechnology Ecology Inorganic Chemistry Environmental Sciences not elsewhere classified Biological Sciences not elsewhere classified Mathematical Sciences not elsewhere classified state space representation kalman filter algorithm integrated ecosystem assessments identifying time series available time series algorithm obtains one recent ecosystem change assessing recent change integrated ecosystem assessment stochastic trend model flagged observation analyses recent observations form model adopts closer analyses assessing whether recent years trend component term trend predicted trend expected trend unexpected tendency predicted trends often need often challenged investigator wants groups typically forecast bands flagged observations final step also presented &# 8220 |
| dc.title.none.fl_str_mv | Matlab code of a function used in S2 File. |
| dc.type.none.fl_str_mv | Dataset info:eu-repo/semantics/publishedVersion dataset |
| description | <div><p>Working groups for integrated ecosystem assessments are often challenged with understanding and assessing recent change in ecosystems. As a basis for this, the groups typically have at their disposal many time series and will often need to prioritize which ones to follow up for closer analyses and assessment. In this article we provide a procedure termed Flagged Observation analysis that can be applied to all the available time series to help identifying time series that should be prioritized. The statistical procedure first applies a structural time series model including a stochastic trend model to the data to estimate the long-term trend. The model adopts a state space representation, and the trend component is estimated by a Kalman filter algorithm. The algorithm obtains one- or more-years-ahead prediction values using all past information from the data. Thus, depending on the number of years the investigator wants to consider as “the most recent”, the expected trend for these years is estimated through the statistical procedure by using only information from the years prior to them. Forecast bands are estimated around the predicted trends for the recent years, and in the final step, an assessment is made on the extent to which observations from the most recent years fall outside these forecast bands. Those that do, may be identified as flagged observations. A procedure is also presented for assessing whether the combined information from all the most recent observations form a pattern that deviates from the predicted trend and thus represents an unexpected tendency that may be flagged. In addition to form the basis for identifying time series that should be prioritized in an integrated ecosystem assessment, flagged observations can provide the basis for communicating with managers and stakeholders about recent ecosystem change. Applications of the framework are illustrated with two worked examples.</p></div> |
| eu_rights_str_mv | openAccess |
| id | Manara_8afde2aa165a110d1bb35f9f8faf81e2 |
| identifier_str_mv | 10.1371/journal.pone.0305716.s006 |
| network_acronym_str | Manara |
| network_name_str | ManaraRepo |
| oai_identifier_str | oai:figshare.com:article/27090231 |
| publishDate | 2024 |
| repository.mail.fl_str_mv | |
| repository.name.fl_str_mv | |
| repository_id_str | |
| rights_invalid_str_mv | CC BY 4.0 |
| spelling | Matlab code of a function used in S2 File.Hiroko Kato Solvang (5718250)Per Arneberg (11964800)BiochemistryMedicineBiotechnologyEcologyInorganic ChemistryEnvironmental Sciences not elsewhere classifiedBiological Sciences not elsewhere classifiedMathematical Sciences not elsewhere classifiedstate space representationkalman filter algorithmintegrated ecosystem assessmentsidentifying time seriesavailable time seriesalgorithm obtains onerecent ecosystem changeassessing recent changeintegrated ecosystem assessmentstochastic trend modelflagged observation analysesrecent observations formmodel adoptscloser analysesassessing whetherrecent yearstrend componentterm trendpredicted trendexpected trendunexpected tendencypredicted trendsoften needoften challengedinvestigator wantsgroups typicallyforecast bandsflagged observationsfinal stepalso presented&# 8220<div><p>Working groups for integrated ecosystem assessments are often challenged with understanding and assessing recent change in ecosystems. As a basis for this, the groups typically have at their disposal many time series and will often need to prioritize which ones to follow up for closer analyses and assessment. In this article we provide a procedure termed Flagged Observation analysis that can be applied to all the available time series to help identifying time series that should be prioritized. The statistical procedure first applies a structural time series model including a stochastic trend model to the data to estimate the long-term trend. The model adopts a state space representation, and the trend component is estimated by a Kalman filter algorithm. The algorithm obtains one- or more-years-ahead prediction values using all past information from the data. Thus, depending on the number of years the investigator wants to consider as “the most recent”, the expected trend for these years is estimated through the statistical procedure by using only information from the years prior to them. Forecast bands are estimated around the predicted trends for the recent years, and in the final step, an assessment is made on the extent to which observations from the most recent years fall outside these forecast bands. Those that do, may be identified as flagged observations. A procedure is also presented for assessing whether the combined information from all the most recent observations form a pattern that deviates from the predicted trend and thus represents an unexpected tendency that may be flagged. In addition to form the basis for identifying time series that should be prioritized in an integrated ecosystem assessment, flagged observations can provide the basis for communicating with managers and stakeholders about recent ecosystem change. Applications of the framework are illustrated with two worked examples.</p></div>2024-09-23T17:28:21ZDatasetinfo:eu-repo/semantics/publishedVersiondataset10.1371/journal.pone.0305716.s006https://figshare.com/articles/dataset/Matlab_code_of_a_function_used_in_S2_File_/27090231CC BY 4.0info:eu-repo/semantics/openAccessoai:figshare.com:article/270902312024-09-23T17:28:21Z |
| spellingShingle | Matlab code of a function used in S2 File. Hiroko Kato Solvang (5718250) Biochemistry Medicine Biotechnology Ecology Inorganic Chemistry Environmental Sciences not elsewhere classified Biological Sciences not elsewhere classified Mathematical Sciences not elsewhere classified state space representation kalman filter algorithm integrated ecosystem assessments identifying time series available time series algorithm obtains one recent ecosystem change assessing recent change integrated ecosystem assessment stochastic trend model flagged observation analyses recent observations form model adopts closer analyses assessing whether recent years trend component term trend predicted trend expected trend unexpected tendency predicted trends often need often challenged investigator wants groups typically forecast bands flagged observations final step also presented &# 8220 |
| status_str | publishedVersion |
| title | Matlab code of a function used in S2 File. |
| title_full | Matlab code of a function used in S2 File. |
| title_fullStr | Matlab code of a function used in S2 File. |
| title_full_unstemmed | Matlab code of a function used in S2 File. |
| title_short | Matlab code of a function used in S2 File. |
| title_sort | Matlab code of a function used in S2 File. |
| topic | Biochemistry Medicine Biotechnology Ecology Inorganic Chemistry Environmental Sciences not elsewhere classified Biological Sciences not elsewhere classified Mathematical Sciences not elsewhere classified state space representation kalman filter algorithm integrated ecosystem assessments identifying time series available time series algorithm obtains one recent ecosystem change assessing recent change integrated ecosystem assessment stochastic trend model flagged observation analyses recent observations form model adopts closer analyses assessing whether recent years trend component term trend predicted trend expected trend unexpected tendency predicted trends often need often challenged investigator wants groups typically forecast bands flagged observations final step also presented &# 8220 |