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- 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 = octave.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