#### 8.2.58.11 tblish.dataset.cars ¶

Static Method: `out =` cars `()` ¶

  Speed and Stopping Distances of Cars

  #### Description ¶

  Speed of cars and distances taken to stop. Note that the data were recorded in the 1920s.

  #### Format ¶

  `speed`

    Speed (mph).

  `dist`

    Stopping distance (ft).

  #### Source ¶

  Ezekiel, M. (1930). Methods of Correlation Analysis. New York: Wiley.

  #### References ¶

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

  #### Examples ¶

      t = tblish.dataset.cars;

      # TODO: Add Lowess smoothed lines to the plots

      figure;
      plot (t.speed, t.dist, "o");
      xlabel ("Speed (mph)"); ylabel ("Stopping distance (ft)");
      title ("cars data");

      figure;
      loglog (t.speed, t.dist, "o");
      xlabel ("Speed (mph)"); ylabel ("Stopping distance (ft)");
      title ("cars data (logarithmic scales)");

      # TODO: Do the linear model plot

      # Polynomial regression
      figure;
      plot (t.speed, t.dist, "o");
      xlabel ("Speed (mph)"); ylabel ("Stopping distance (ft)");
      title ("cars polynomial regressions");
      hold on
      xlim ([0 25]);
      x2 = linspace (0, 25, 200);
      for degree = 1:4
        [P, S, mu] = polyfit (t.speed, t.dist, degree);
        y2 = polyval(P, x2, [], mu);
        plot (x2, y2);
      endfor