#### 8.2.58.64 tblish.dataset.sunspots ¶

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

  Monthly Sunspot Numbers, 1749-1983

  #### Description ¶

  Monthly mean relative sunspot numbers from 1749 to 1983. Collected at Swiss Federal Observatory, Zurich until 1960, then Tokyo Astronomical Observatory.

  #### Format ¶

  `month`

    Month of the observation.

  `sunspots`

    Number of observed sunspots.

  #### Source ¶

  Andrews, D. F. and Herzberg, A. M. (1985) Data: A Collection of Problems from Many Fields for the Student and Research Worker. New York: Springer-Verlag.

  #### Examples ¶

      t = tblish.dataset.sunspots;

      figure
      plot (datenum (t.month), t.sunspots)
      datetick ("x")
      xlabel ("Date")
      ylabel ("Monthly sunspot numbers")
      title ("sunspots data")