#### 8.2.57.12 tblish.dataset.ChickWeight ¶

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

  Weight versus age of chicks on different diets

  #### Format ¶

  `weight`

    a numeric vector giving the body weight of the chick (gm).

  `Time`

    a numeric vector giving the number of days since birth when the measurement was made.

  `Chick`

    an ordered factor with levels 18 < ... < 48 giving a unique identifier for the chick. The ordering of the levels groups chicks on the same diet together and orders them according to their final weight (lightest to heaviest) within diet.

  `Diet`

    a factor with levels 1, ..., 4 indicating which experimental diet the chick received.

  #### Source ¶

  Crowder, M. and Hand, D. (1990). Analysis of Repeated Measures. London: Chapman and Hall. (example 5.3)

  Hand, D. and Crowder, M. (1996), Practical Longitudinal Data Analysis. London: Chapman and Hall. (table A.2)

  Pinheiro, J. C. and Bates, D. M. (2000) Mixed-effects Models in S and S-PLUS. New York: Springer.

  #### Examples ¶

      t = tblish.dataset.ChickWeight

      tblish.examples.coplot (t, "Time", "weight", "Chick");