Edge Principal Components and Squash Clustering: Using the Special Structure of Phylogenetic Placement Data for Sample Comparison
- Publication Date
- March 11, 2013
- Journal
- PLOS ONE
- Authors
- Frederick A. Matsen Iv & Steven N. Evans
- Volume
- 8
- Issue
- 3
- Pages
- e56859
- DOI
- https://dx.plos.org/10.1371/journal.pone.0056859
- Publisher URL
- http://journals.plos.org/plosone/article?id=10.1371%2Fjournal.pone.0056859
- PubMed
- http://www.ncbi.nlm.nih.gov/pubmed/23505415
- PubMed Central
- http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3594297
- Europe PMC
- http://europepmc.org/abstract/MED/23505415
- Web of Science
- 000316251100004
- Scopus
- 84874882695
- Mendeley
- http://www.mendeley.com/research/edge-principal-components-squash-clustering-using-special-structure-phylogenetic-placement-data-samp
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CiteULike | Further Information
- {"link"=>{"url"=>"http://www.citeulike.org/user/Zephyrus/article/12198641"}, "post_time"=>"2013-03-23 08:02:36", "tag"=>["association", "comparison", "methods", "microbiome", "statistics"], "linkout"=>{"type"=>"DOI", "url"=>"http://dx.doi.org/10.1371/journal.pone.0056859"}, "username"=>"Zephyrus", "article_id"=>"12198641"}
- {"link"=>{"url"=>"http://www.citeulike.org/user/jmeppley/article/12198641"}, "post_time"=>"2013-04-02 14:10:40", "tag"=>["clustering", "human-microbiology", "metagenomics", "pca", "statistics"], "linkout"=>{"type"=>"DOI", "url"=>"http://dx.doi.org/10.1371/journal.pone.0056859"}, "username"=>"jmeppley", "article_id"=>"12198641"}
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Mendeley | Further Information
{"title"=>"Edge Principal Components and Squash Clustering: Using the Special Structure of Phylogenetic Placement Data for Sample Comparison", "type"=>"journal", "authors"=>[{"first_name"=>"Frederick A.", "last_name"=>"Matsen IV", "scopus_author_id"=>"55620556600"}, {"first_name"=>"Steven N.", "last_name"=>"Evans", "scopus_author_id"=>"55214872900"}], "year"=>2013, "source"=>"PLoS ONE", "identifiers"=>{"pui"=>"368506814", "arxiv"=>"1107.5095", "issn"=>"19326203", "isbn"=>"1932-6203 (Electronic)\\n1932-6203 (Linking)", "doi"=>"10.1371/journal.pone.0056859", "scopus"=>"2-s2.0-84874882695", "pmid"=>"23505415", "sgr"=>"84874882695"}, "id"=>"a4ce2bae-00eb-3f0f-a768-9c6195bec0b4", "abstract"=>"Principal components (PCA) and hierarchical clustering are two of the most heavily used techniques for analyzing the differences between nucleic acid sequence samples sampled from a given environment. However, a classical application of these techniques to distances computed between samples can lack transparency because there is no ready interpretation of the axes of classical PCA plots, and it is difficult to assign any clear intuitive meaning to either the internal nodes or the edge lengths of trees produced by distance-based hierarchical clustering methods such as UPGMA. We show that more interesting and interpretable results are produced by two new methods that leverage the special structure of phylogenetic placement data. Edge principal components analysis enables the detection of important differences between samples that contain closely related taxa. Each principal component axis is simply a collection of signed weights on the edges of the phylogenetic tree, and these weights are easily visualized by a suitable thickening and coloring of the edges. Squash clustering outputs a (rooted) clustering tree in which each internal node corresponds to an appropriate \"average\" of the original samples at the leaves below the node. Moreover, the length of an edge is a suitably defined distance between the averaged samples associated with the two incident nodes, rather than the less interpretable average of distances produced by UPGMA. We present these methods and illustrate their use with data from the microbiome of the human vagina.", "link"=>"http://www.mendeley.com/research/edge-principal-components-squash-clustering-using-special-structure-phylogenetic-placement-data-samp", "reader_count"=>164, "reader_count_by_academic_status"=>{"Unspecified"=>7, "Professor > Associate Professor"=>3, "Researcher"=>48, "Student > Doctoral Student"=>5, "Student > Ph. D. Student"=>64, "Student > Postgraduate"=>2, "Student > Master"=>16, "Other"=>4, "Student > Bachelor"=>6, "Lecturer"=>1, "Professor"=>8}, "reader_count_by_user_role"=>{"Unspecified"=>7, "Professor > Associate Professor"=>3, "Researcher"=>48, "Student > Doctoral Student"=>5, "Student > Ph. D. Student"=>64, "Student > Postgraduate"=>2, "Student > Master"=>16, "Other"=>4, "Student > Bachelor"=>6, "Lecturer"=>1, "Professor"=>8}, "reader_count_by_subject_area"=>{"Unspecified"=>9, "Agricultural and Biological Sciences"=>102, "Arts and Humanities"=>1, "Computer Science"=>10, "Earth and Planetary Sciences"=>1, "Engineering"=>2, "Environmental Science"=>13, "Biochemistry, Genetics and Molecular Biology"=>11, "Mathematics"=>7, "Medicine and Dentistry"=>3, "Neuroscience"=>2, "Physics and Astronomy"=>1, "Immunology and Microbiology"=>2}, "reader_count_by_subdiscipline"=>{"Medicine and Dentistry"=>{"Medicine and Dentistry"=>3}, "Physics and Astronomy"=>{"Physics and Astronomy"=>1}, "Mathematics"=>{"Mathematics"=>7}, "Unspecified"=>{"Unspecified"=>9}, "Environmental Science"=>{"Environmental Science"=>13}, "Arts and Humanities"=>{"Arts and Humanities"=>1}, "Engineering"=>{"Engineering"=>2}, "Neuroscience"=>{"Neuroscience"=>2}, "Earth and Planetary Sciences"=>{"Earth and Planetary Sciences"=>1}, "Immunology and Microbiology"=>{"Immunology and Microbiology"=>2}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>102}, "Computer Science"=>{"Computer Science"=>10}, "Biochemistry, Genetics and Molecular Biology"=>{"Biochemistry, Genetics and Molecular Biology"=>11}}, "reader_count_by_country"=>{"Canada"=>4, "Sweden"=>5, "United States"=>24, "Japan"=>1, "United Kingdom"=>2, "France"=>3, "Switzerland"=>1, "Germany"=>2, "Estonia"=>2}, "group_count"=>6}CrossRef
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Scopus | Further Information
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- {"id"=>"311431689345826817", "text"=>"Edge Principal Components & Squash Clustering: Using Structure of Phylogenetic Placement Data for Sample Comparison @ http://t.co/D1rS60XZTB", "created_at"=>"2013-03-12T11:01:15Z", "user"=>"SAGRudd", "user_name"=>"Stephen Rudd", "user_profile_image"=>"http://a0.twimg.com/profile_images/1387284629/n1350228140_30403185_7501029_normal.jpg"}
- {"id"=>"311502518834307072", "text"=>"Our edge PCA / squash clustering paper finally out in #PLOSONE: http://t.co/HHpYoJxsbu", "created_at"=>"2013-03-12T15:42:42Z", "user"=>"ematsen", "user_name"=>"(Fred)erick Matsen", "user_profile_image"=>"http://a0.twimg.com/profile_images/2362170242/xkd848pckplo65u9wm72_normal.png"}
- {"id"=>"311566306472239107", "text"=>"RT @ematsen: Our edge PCA / squash clustering paper finally out in #PLOSONE: http://t.co/HHpYoJxsbu", "created_at"=>"2013-03-12T19:56:10Z", "user"=>"koadman", "user_name"=>"Aaron Darling", "user_profile_image"=>"http://a0.twimg.com/profile_images/1826921528/me_normal.jpg"}
- {"id"=>"311579300388286464", "text"=>"RT @ematsen: Our edge PCA / squash clustering paper finally out in #PLOSONE: http://t.co/HHpYoJxsbu", "created_at"=>"2013-03-12T20:47:48Z", "user"=>"Dr_Bik", "user_name"=>"Holly Bik", "user_profile_image"=>"http://a0.twimg.com/profile_images/1389336556/0167_normal.png"}
- {"id"=>"311581288798777345", "text"=>"#PLOSONE: Edge Principal Components and Squash Clustering http://t.co/9g9ZKPdUlo by @ematsen #phylogenetics #metagenomics #bioinformatics", "created_at"=>"2013-03-12T20:55:42Z", "user"=>"AhmedMoustafa", "user_name"=>"Ahmed Moustafa", "user_profile_image"=>"http://a0.twimg.com/profile_images/1268737076/ahmed_normal.jpg"}
- {"id"=>"311581789309255681", "text"=>"Very cool. Must digest. RT @ematsen: Our edge PCA / squash clustering paper finally out in #PLOSONE: http://t.co/WyuvD7kh70", "created_at"=>"2013-03-12T20:57:42Z", "user"=>"JamesMeadow", "user_name"=>"James Meadow", "user_profile_image"=>"http://a0.twimg.com/profile_images/2628040343/bwa4cpwi4lvlypmj01ei_normal.jpeg"}
- {"id"=>"311684468589088769", "text"=>"RT @AhmedMoustafa: #PLOSONE: Edge Principal Components and Squash Clustering http://t.co/9g9ZKPdUlo by @ematsen #phylogenetics #metageno ...", "created_at"=>"2013-03-13T03:45:42Z", "user"=>"JChrisPires", "user_name"=>"J. Chris Pires", "user_profile_image"=>"http://a0.twimg.com/profile_images/1416048607/jcp_2011_normal.jpg"}
- {"id"=>"314753880753844224", "text"=>"Using the Special Structure of Phylogenetic Placement Data for Sample Comparison, from @ematsen (via @phylogenomics) http://t.co/Pa5aW2lCg0", "created_at"=>"2013-03-21T15:02:27Z", "user"=>"DrJCThrash", "user_name"=>"Cameron Thrash", "user_profile_image"=>"http://a0.twimg.com/profile_images/1832768989/IMG_3135v2_normal.jpg"}
- {"id"=>"317069054651297793", "text"=>"Will have to try this on my Illumina data full of 16S seqs #PLOSONE Edge Principal Components and Squash Clustering: http://t.co/tZeBLOMqZg", "created_at"=>"2013-03-28T00:22:08Z", "user"=>"kgwin1018", "user_name"=>"Kelley Nunez", "user_profile_image"=>"http://a0.twimg.com/profile_images/3358910545/3987079244262f1e8df30eb78de19c5e_normal.jpeg"}
- {"id"=>"336987204490498048", "text"=>"@gilbertjacka @ematsen indeed, and it is a terrific method http://t.co/ymncVvV7Ap", "created_at"=>"2013-05-21T23:29:45Z", "user"=>"JamesMeadow", "user_name"=>"James Meadow", "user_profile_image"=>"http://a0.twimg.com/profile_images/2628040343/bwa4cpwi4lvlypmj01ei_normal.jpeg"}
- {"id"=>"336987298187063296", "text"=>"RT @JamesMeadow: @gilbertjacka @ematsen indeed, and it is a terrific method http://t.co/ymncVvV7Ap", "created_at"=>"2013-05-21T23:30:07Z", "user"=>"gilbertjacka", "user_name"=>"Jack A Gilbert", "user_profile_image"=>"http://a0.twimg.com/profile_images/2330006367/image_normal.jpg"}
- {"id"=>"336994132352450560", "text"=>"RT @JamesMeadow: @gilbertjacka @ematsen indeed, and it is a terrific method http://t.co/ymncVvV7Ap", "created_at"=>"2013-05-21T23:57:16Z", "user"=>"gibbological", "user_name"=>"Sean Gibbons", "user_profile_image"=>"http://a0.twimg.com/profile_images/3376660714/1f7c79f7beffc9ad48251bffdb4d678e_normal.jpeg"}
- {"id"=>"337035539687555072", "text"=>"RT @JamesMeadow: @gilbertjacka @ematsen indeed, and it is a terrific method http://t.co/ymncVvV7Ap", "created_at"=>"2013-05-22T02:41:49Z", "user"=>"OUMasonLab", "user_name"=>"Olivia Mason", "user_profile_image"=>"http://a0.twimg.com/profile_images/3120609703/d41eaaeb63e9c1d6313438beea9dab63_normal.jpeg"}
- {"id"=>"365134870596419585", "text"=>"Cool: Edge PCA for phylogenetic overlap between microbial communities. Useful forensics applctns. http://t.co/VkFR4bvFPn via @phylogenomics", "created_at"=>"2013-08-07T15:38:31Z", "user"=>"genetics_blog", "user_name"=>"Stephen Turner", "user_profile_image"=>"http://a0.twimg.com/profile_images/1356990961/pic2-square-cropped-350x350_normal.jpg"}
- {"id"=>"365635021098323969", "text"=>"RT @genetics_blog: Cool: Edge PCA for phylogenetic overlap between microbial communities. Useful forensics applctns. http://t.co/VkFR4bvFPn…", "created_at"=>"2013-08-09T00:45:56Z", "user"=>"isugif", "user_name"=>"Genome Informatics", "user_profile_image"=>"http://a0.twimg.com/profile_images/1585217497/Mecrop_normal.jpg"}
- {"id"=>"440685079904673792", "text"=>"Edge Principal Components and Squash Clustering: Using the Special Structure of Phylogenetic Placement Data for Samp… http://t.co/t528jw98DV", "created_at"=>"2014-03-04T03:08:05Z", "user"=>"jameslz", "user_name"=>"Lei ZHANG", "user_profile_image"=>"http://pbs.twimg.com/profile_images/3014186424/18de37239fd8e5e0e2a1f1fa241552ae_normal.jpeg"}
- {"id"=>"446369917428699136", "text"=>"if @PLOSONE knows 2 figure legends are reversed, why let people download the article uncorrected? #frustrating10mins http://t.co/I1PiYElIDC", "created_at"=>"2014-03-19T19:37:36Z", "user"=>"sarahmhird", "user_name"=>"Sarah Hird", "user_profile_image"=>"http://pbs.twimg.com/profile_images/2392353789/167507_614705134224_1799122_n_normal.jpg"}
- {"id"=>"740918418052919296", "text"=>"@samuel_barreto8 nah, that's the cool way: https://t.co/4zzfN1Z7Tr", "created_at"=>"2016-06-09T14:48:11Z", "user"=>"LassalleFlo", "user_name"=>"Florent Lassalle", "user_profile_image"=>"http://pbs.twimg.com/profile_images/541998406118277120/KffASriu_normal.jpeg"}
- {"id"=>"844173919892328448", "text"=>"Reading: Phylofactorization of microbiome data https://t.co/FqPOOAX0SS & trying to compare it to EDGE-PCA https://t.co/TF6tg2Gibc #phylogeny", "created_at"=>"2017-03-21T13:08:41Z", "user"=>"phylogenomics", "user_name"=>"Jonathan Eisen", "user_profile_image"=>"http://pbs.twimg.com/profile_images/751288576403382273/AKfTiFxx_normal.jpg"}
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- {"month"=>"3", "year"=>"2017", "pdf_views"=>"164", "xml_views"=>"0", "html_views"=>"199"}
- {"month"=>"4", "year"=>"2017", "pdf_views"=>"16", "xml_views"=>"0", "html_views"=>"68"}
- {"month"=>"5", "year"=>"2017", "pdf_views"=>"13", "xml_views"=>"0", "html_views"=>"53"}
- {"month"=>"6", "year"=>"2017", "pdf_views"=>"10", "xml_views"=>"0", "html_views"=>"69"}
- {"month"=>"7", "year"=>"2017", "pdf_views"=>"10", "xml_views"=>"3", "html_views"=>"69"}
- {"month"=>"8", "year"=>"2017", "pdf_views"=>"22", "xml_views"=>"1", "html_views"=>"61"}
- {"month"=>"9", "year"=>"2017", "pdf_views"=>"12", "xml_views"=>"1", "html_views"=>"67"}
- {"month"=>"10", "year"=>"2017", "pdf_views"=>"6", "xml_views"=>"1", "html_views"=>"42"}
- {"month"=>"11", "year"=>"2017", "pdf_views"=>"11", "xml_views"=>"1", "html_views"=>"82"}
- {"month"=>"12", "year"=>"2017", "pdf_views"=>"6", "xml_views"=>"1", "html_views"=>"41"}
- {"month"=>"1", "year"=>"2018", "pdf_views"=>"8", "xml_views"=>"1", "html_views"=>"187"}
- {"month"=>"2", "year"=>"2018", "pdf_views"=>"18", "xml_views"=>"0", "html_views"=>"27"}
- {"month"=>"3", "year"=>"2018", "pdf_views"=>"13", "xml_views"=>"3", "html_views"=>"61"}
- {"month"=>"4", "year"=>"2018", "pdf_views"=>"10", "xml_views"=>"0", "html_views"=>"35"}
- {"month"=>"5", "year"=>"2018", "pdf_views"=>"12", "xml_views"=>"0", "html_views"=>"40"}
- {"month"=>"6", "year"=>"2018", "pdf_views"=>"16", "xml_views"=>"0", "html_views"=>"26"}
- {"month"=>"7", "year"=>"2018", "pdf_views"=>"8", "xml_views"=>"3", "html_views"=>"20"}
- {"month"=>"8", "year"=>"2018", "pdf_views"=>"9", "xml_views"=>"1", "html_views"=>"24"}
- {"month"=>"9", "year"=>"2018", "pdf_views"=>"30", "xml_views"=>"0", "html_views"=>"27"}
- {"month"=>"10", "year"=>"2018", "pdf_views"=>"12", "xml_views"=>"2", "html_views"=>"17"}
- {"month"=>"11", "year"=>"2018", "pdf_views"=>"11", "xml_views"=>"0", "html_views"=>"21"}
- {"month"=>"12", "year"=>"2018", "pdf_views"=>"8", "xml_views"=>"0", "html_views"=>"18"}
- {"month"=>"1", "year"=>"2019", "pdf_views"=>"6", "xml_views"=>"0", "html_views"=>"19"}
- {"month"=>"2", "year"=>"2019", "pdf_views"=>"10", "xml_views"=>"0", "html_views"=>"16"}
- {"month"=>"3", "year"=>"2019", "pdf_views"=>"14", "xml_views"=>"0", "html_views"=>"20"}
- {"month"=>"4", "year"=>"2019", "pdf_views"=>"16", "xml_views"=>"0", "html_views"=>"15"}
- {"month"=>"5", "year"=>"2019", "pdf_views"=>"12", "xml_views"=>"0", "html_views"=>"17"}
- {"month"=>"6", "year"=>"2019", "pdf_views"=>"7", "xml_views"=>"0", "html_views"=>"20"}
- {"month"=>"7", "year"=>"2019", "pdf_views"=>"25", "xml_views"=>"0", "html_views"=>"30"}
- {"month"=>"8", "year"=>"2019", "pdf_views"=>"12", "xml_views"=>"1", "html_views"=>"16"}
- {"month"=>"9", "year"=>"2019", "pdf_views"=>"16", "xml_views"=>"0", "html_views"=>"20"}
- {"month"=>"10", "year"=>"2019", "pdf_views"=>"10", "xml_views"=>"0", "html_views"=>"25"}
- {"month"=>"11", "year"=>"2019", "pdf_views"=>"7", "xml_views"=>"0", "html_views"=>"29"}
- {"month"=>"12", "year"=>"2019", "pdf_views"=>"5", "xml_views"=>"0", "html_views"=>"7"}
PMC Usage Stats | Further Information
- {"unique-ip"=>"6", "full-text"=>"4", "pdf"=>"3", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"3", "supp-data"=>"2", "cited-by"=>"0", "year"=>"2013", "month"=>"3"}
- {"unique-ip"=>"14", "full-text"=>"12", "pdf"=>"6", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"1", "supp-data"=>"4", "cited-by"=>"0", "year"=>"2013", "month"=>"4"}
- {"unique-ip"=>"17", "full-text"=>"12", "pdf"=>"6", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"1", "supp-data"=>"2", "cited-by"=>"0", "year"=>"2013", "month"=>"5"}
- {"unique-ip"=>"7", "full-text"=>"8", "pdf"=>"2", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"3", "cited-by"=>"0", "year"=>"2013", "month"=>"6"}
- {"unique-ip"=>"9", "full-text"=>"9", "pdf"=>"2", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"1", "cited-by"=>"1", "year"=>"2013", "month"=>"7"}
- {"unique-ip"=>"7", "full-text"=>"8", "pdf"=>"2", "abstract"=>"2", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2013", "month"=>"8"}
- {"unique-ip"=>"10", "full-text"=>"10", "pdf"=>"3", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"3", "supp-data"=>"1", "cited-by"=>"0", "year"=>"2013", "month"=>"9"}
- {"unique-ip"=>"9", "full-text"=>"9", "pdf"=>"3", "abstract"=>"1", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2013", "month"=>"10"}
- {"unique-ip"=>"17", "full-text"=>"17", "pdf"=>"4", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"10", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2013", "month"=>"11"}
- {"unique-ip"=>"3", "full-text"=>"3", "pdf"=>"2", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2013", "month"=>"12"}
- {"unique-ip"=>"6", "full-text"=>"4", "pdf"=>"3", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"7", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2014", "month"=>"1"}
- {"unique-ip"=>"6", "full-text"=>"6", "pdf"=>"2", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"1", "year"=>"2014", "month"=>"2"}
- {"unique-ip"=>"3", "full-text"=>"5", "pdf"=>"1", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"2", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2014", "month"=>"3"}
- {"unique-ip"=>"7", "full-text"=>"2", "pdf"=>"5", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2014", "month"=>"6"}
- {"unique-ip"=>"2", "full-text"=>"1", "pdf"=>"1", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2014", "month"=>"4"}
- {"unique-ip"=>"3", "full-text"=>"3", "pdf"=>"0", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"2", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2015", "month"=>"4"}
- {"unique-ip"=>"2", "full-text"=>"2", "pdf"=>"1", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2015", "month"=>"5"}
- {"unique-ip"=>"4", "full-text"=>"3", "pdf"=>"1", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2015", "month"=>"6"}
- {"unique-ip"=>"9", "full-text"=>"11", "pdf"=>"0", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2015", "month"=>"7"}
- {"unique-ip"=>"16", "full-text"=>"15", "pdf"=>"4", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"3", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2015", "month"=>"3"}
- {"unique-ip"=>"13", "full-text"=>"9", "pdf"=>"6", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"2", "supp-data"=>"0", "cited-by"=>"3", "year"=>"2015", "month"=>"2"}
- {"unique-ip"=>"5", "full-text"=>"2", "pdf"=>"2", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"1", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2015", "month"=>"8"}
- {"unique-ip"=>"6", "full-text"=>"7", "pdf"=>"0", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2015", "month"=>"9"}
- {"unique-ip"=>"10", "full-text"=>"11", "pdf"=>"0", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"8", "supp-data"=>"0", "cited-by"=>"1", "year"=>"2015", "month"=>"10"}
- {"unique-ip"=>"2", "full-text"=>"3", "pdf"=>"2", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2014", "month"=>"7"}
- {"unique-ip"=>"4", "full-text"=>"2", "pdf"=>"2", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"2", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2014", "month"=>"8"}
- {"unique-ip"=>"5", "full-text"=>"2", "pdf"=>"1", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"7", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2014", "month"=>"9"}
- {"unique-ip"=>"8", "full-text"=>"5", "pdf"=>"3", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"1", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2014", "month"=>"10"}
- {"unique-ip"=>"3", "full-text"=>"2", "pdf"=>"2", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"2", "supp-data"=>"1", "cited-by"=>"0", "year"=>"2016", "month"=>"2"}
- {"unique-ip"=>"11", "full-text"=>"3", "pdf"=>"2", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"4", "supp-data"=>"2", "cited-by"=>"1", "year"=>"2014", "month"=>"11"}
- {"unique-ip"=>"2", "full-text"=>"2", "pdf"=>"0", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"1", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2014", "month"=>"12"}
- {"unique-ip"=>"4", "full-text"=>"3", "pdf"=>"1", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2015", "month"=>"1"}
- {"unique-ip"=>"8", "full-text"=>"8", "pdf"=>"3", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2015", "month"=>"11"}
- {"unique-ip"=>"2", "full-text"=>"2", "pdf"=>"0", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2015", "month"=>"12"}
- {"unique-ip"=>"5", "full-text"=>"4", "pdf"=>"1", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2016", "month"=>"1"}
- {"unique-ip"=>"6", "full-text"=>"6", "pdf"=>"0", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2016", "month"=>"3"}
- {"unique-ip"=>"4", "full-text"=>"3", "pdf"=>"0", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"1", "cited-by"=>"0", "year"=>"2016", "month"=>"4"}
- {"unique-ip"=>"1", "full-text"=>"0", "pdf"=>"1", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2016", "month"=>"5"}
- {"unique-ip"=>"5", "full-text"=>"5", "pdf"=>"2", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"1", "supp-data"=>"1", "cited-by"=>"0", "year"=>"2016", "month"=>"6"}
- {"unique-ip"=>"2", "full-text"=>"2", "pdf"=>"0", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"1", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2016", "month"=>"7"}
- {"unique-ip"=>"1", "full-text"=>"1", "pdf"=>"0", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2016", "month"=>"8"}
- {"unique-ip"=>"1", "full-text"=>"2", "pdf"=>"0", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2016", "month"=>"9"}
- {"unique-ip"=>"11", "full-text"=>"7", "pdf"=>"5", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2016", "month"=>"10"}
- {"unique-ip"=>"4", "full-text"=>"3", "pdf"=>"1", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2016", "month"=>"11"}
- {"unique-ip"=>"3", "full-text"=>"3", "pdf"=>"0", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2016", "month"=>"12"}
- {"unique-ip"=>"4", "full-text"=>"3", "pdf"=>"1", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"1", "year"=>"2017", "month"=>"1"}
- {"unique-ip"=>"3", "full-text"=>"3", "pdf"=>"0", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"2"}
- {"unique-ip"=>"6", "full-text"=>"7", "pdf"=>"0", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"3"}
- {"unique-ip"=>"3", "full-text"=>"3", "pdf"=>"1", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"1", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"4"}
- {"unique-ip"=>"9", "full-text"=>"8", "pdf"=>"2", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"5"}
- {"unique-ip"=>"4", "full-text"=>"4", "pdf"=>"0", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"2", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"6"}
- {"unique-ip"=>"1", "full-text"=>"1", "pdf"=>"0", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"7"}
- {"unique-ip"=>"1", "full-text"=>"1", "pdf"=>"0", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"8"}
- {"unique-ip"=>"11", "full-text"=>"4", "pdf"=>"0", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"9", "supp-data"=>"1", "cited-by"=>"0", "year"=>"2017", "month"=>"9"}
- {"unique-ip"=>"9", "full-text"=>"6", "pdf"=>"4", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"2", "cited-by"=>"0", "year"=>"2017", "month"=>"10"}
- {"unique-ip"=>"9", "full-text"=>"8", "pdf"=>"0", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"3", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"11"}
- {"unique-ip"=>"4", "full-text"=>"3", "pdf"=>"1", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2017", "month"=>"12"}
- {"unique-ip"=>"3", "full-text"=>"2", "pdf"=>"0", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"9", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2018", "month"=>"1"}
- {"unique-ip"=>"3", "full-text"=>"3", "pdf"=>"1", "abstract"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2018", "month"=>"3"}
- {"unique-ip"=>"4", "full-text"=>"6", "pdf"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2019", "month"=>"1"}
- {"unique-ip"=>"3", "full-text"=>"3", "pdf"=>"0", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"1", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2018", "month"=>"4"}
- {"unique-ip"=>"5", "full-text"=>"5", "pdf"=>"1", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2018", "month"=>"5"}
- {"unique-ip"=>"6", "full-text"=>"4", "pdf"=>"1", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"5", "supp-data"=>"1", "cited-by"=>"0", "year"=>"2018", "month"=>"11"}
- {"unique-ip"=>"12", "full-text"=>"11", "pdf"=>"1", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"2", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2018", "month"=>"6"}
- {"unique-ip"=>"9", "full-text"=>"5", "pdf"=>"4", "scanned-summary"=>"0", "scanned-page-browse"=>"0", "figure"=>"0", "supp-data"=>"0", "cited-by"=>"0", "year"=>"2018", "month"=>"8"}
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Relative Metric
{"start_date"=>"2013-01-01T00:00:00Z", "end_date"=>"2013-12-31T00:00:00Z", "subject_areas"=>[{"subject_area"=>"/Biology and life sciences", "average_usage"=>[269, 466, 588, 697, 800, 896, 988, 1076, 1165, 1254, 1340, 1417]}, {"subject_area"=>"/Biology and life sciences/Taxonomy", "average_usage"=>[315, 535, 673, 799, 934, 1049, 1169, 1261, 1387, 1467, 1612, 1696, 1781]}, {"subject_area"=>"/Computer and information sciences/Data management", "average_usage"=>[301, 521, 654, 776, 898, 1028, 1133, 1258, 1373, 1457, 1542, 1648, 1738]}, {"subject_area"=>"/Physical sciences/Mathematics", "average_usage"=>[259, 431, 541, 639, 727, 816, 898, 980, 1061, 1136, 1214, 1294, 1356]}]}Loading … 

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