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======Hiver 2014======

  * [[https://stt4230.rbind.io/tutoriels_etudiants/hiver_2014/agreger_donnees_plyr/|Agréger]]
  * [[https://stt4230.rbind.io/tutoriels_etudiants/hiver_2014/large_vers_long_reshape2/|Format large vers long]]
  * [[https://stt4230.rbind.io/tutoriels_etudiants/hiver_2014/long_vers_large_reshape2/|Format long vers large]]
  * [[https://stt4230.rbind.io/tutoriels_etudiants/hiver_2014/ordonner_donnees_plyr/|Ordonner]]