• PeerJjournal home
    • PeerJ (Life, Bio, Environment & Health Sciences)
    • PeerJ Computer Science
    • PeerJ Preprints (not peer-reviewed)
    • Visit PeerJ.org and get involved
  • Sections
    • About the journal Sections
    • Aquatic Biology
    • Biochemistry, Biophysics and Molecular Biology
    • Biodiversity and Conservation
    • Bioinformatics and Genomics
    • Brain and Cognition
    • Ecology
    • Microbiology
    • Paleontology and Evolutionary Science
    • Plant Biology
    • Zoological Science
  • About PeerJ
    • Peer Journals Overview
    • Peer Journals FAQ
    • What we publish
    • 5 Years publishing
    • Solutions for authors
    • Reputation
    • High quality peer review
    • Fast publishing
    • Indexing and Impact Factor
    • Global readership
    • Feature comparison
    • Reduced cost publishing
    • Author feedback
    • Early career researcher benefits
    • Senior researcher benefits
    • Open review (optional)
    • Rebuttal letters
  • More
    • Subjects
    • Search articles
      • Advanced search of articles & preprints
      • PeerJ - Medicine articles
      • PeerJ - Biology & Life science articles
      • PeerJ Computer Science
      • PeerJ Preprints
    • Table of contents
      • Table of Contents - current and archives
      • PeerJ - Medicine articles
      • PeerJ - Biology & Life science articles
      • PeerJ - Environmental Science articles
      • PeerJ - General bio (stats, legal, policy, edu)
      • PeerJ Computer Science
      • PeerJ Preprints
    • Academic advisors
    • Volunteer to review
    • Collections
    • Job listings
    • Discussions
    • Blog
    • Institutional plans
    • Reviews and awards
    • Spread the word
    • Who we are
    • Contact
  • Login
    • FOR AUTHORS
      • Submission Guidelines
      • Subject Areas
      • Editorial Board
      • Editorial Criteria
      • Pricing
      • General FAQ
      • Computer Science FAQ
      • Aims and Scope
      • Author Interviews
      • Policies and Procedures
    • SUBMIT ARTICLE

    Current Issue - March 2018

    Table of Contents - PeerJ Preprints

    Sorted by downloads
    • Publication date
    • Downloads
    • Pageviews
    Preprints
    • PeerJ - Medicine articles
    • PeerJ - Biology & Life science articles
    • PeerJ - General bio (stats, legal, policy, edu)
    • PeerJ Computer Science
    • PeerJ Preprints
    programming-languages
    Login to save + alerts
    March 20, 2018 - Version: 1
    SAS macros for longitudinal IRT models
    39 downloads
    79 views
    Maja Olsbjerg, Karl Bang Christensen
    data-science
    graphics
    programming-languages
    https://doi.org/10.7287/peerj.preprints.26740v1
    • ← Previous
    • 1
    • Next →

    Archives - Preprints

    programming-languages
    2018
    • March 1
    2017
    • November 1
    • September 1
    • August 1
    • May 1
    • January 1
    2016
    • September 3
    • July 1
    • June 1
    • May 1
    • April 1
    • February 1
    2015
    • November 1
    • July 2
    • June 2
    • May 1
    • March 1
    • February 2

    Filter on subjects this month

    • data-science 1
    • graphics 1
    • programming-languages 1
    About us - PeerJ team | Our publications | Benefits | Partnerships | Endorsements Awards
    Resources - FAQ | Careers | Press room | Terms of use | Privacy | Contact
    Academic boards - Advisors | Editors | Subject areas
    Follow us - PeerJ blog | Twitter | Facebook | Google+ | LinkedIn | Pinterest
    Submission guides - PeerJ instructions | PeerJ CS instructions | PeerJ Preprints instructions
    Spread the word - Activities | Resources
     
    PeerJ feeds - Atom | RSS 1.0 | RSS 2.0 | JSON
    PeerJ Computer Science feeds - Atom | RSS 1.0 | RSS 2.0 | JSON
    PeerJ Preprint feeds - Atom | RSS 1.0 | RSS 2.0 | JSON
    Archives - PeerJ | PeerJ Computer Science | PeerJ Preprints
    ©2012-2018 PeerJ, Inc | Public user content licensed CC BY 4.0 unless otherwise specified.
    PeerJ ISSN: 2167-8359 PeerJ Comput. Sci. ISSN: 2376-5992 PeerJ Preprints ISSN: 2167-9843