#### 8.2.57.52 tblish.dataset.presidents ¶

Static Method: `out =` presidents `()` ¶

  Quarterly Approval Ratings of US Presidents

  #### Description ¶

  The (approximately) quarterly approval rating for the President of the United States from the first quarter of 1945 to the last quarter of 1974.

  #### Format ¶

  `date`

    Approximate date of the observation.

  `approval`

    Approval rating (%).

  #### Details ¶

  The data are actually a fudged version of the approval ratings. See McNeil’s book for details.

  #### Source ¶

  The Gallup Organisation.

  #### References ¶

  McNeil, D. R. (1977). Interactive Data Analysis. New York: Wiley.

  #### Examples ¶

      t = tblish.dataset.presidents;

      figure
      plot (datenum (t.date), t.approval)
      datetick ("x")
      xlabel ("Date")
      ylabel ("Approval rating (%)")
      title ("presidents data")