Orthodont

The <code>Orthodont</code> data frame has 108 rows and 4 columns of the
  change in an orthdontic measurement over time for several young subjects.

datasets

Fit and compare Gaussian linear and nonlinear mixed-effects models.

R-core R-core@R-project.org

nlme

Linear and Nonlinear Mixed Effects Models

Orthodont function

This data frame contains the following columns:
  <dl class="dl-horizontal">
    <dt>distance</dt><dd>
      a numeric vector of distances from the pituitary to the
      pterygomaxillary fissure (mm).  These distances are measured
      on x-ray images of the skull.
    </dd>
    <dt>age</dt><dd>
      a numeric vector of ages of the subject (yr).
    </dd>
    <dt>Subject</dt><dd>
      an ordered factor indicating the subject on which the
      measurement was made.  The levels are labelled <code>M01</code>
      to <code>M16</code> for the males and <code>F01</code> to <code>F13</code> for
      the females.  The ordering is by increasing average distance
      within sex.
    </dd>
    <dt>Sex</dt><dd>
      a factor with levels
      <code>Male</code> and
      <code>Female</code> 
    </dd>
  </dl>

Format

Growth curve data on an orthdontic measurement — Orthodont

This data frame contains the following columns:
  <dl class='dl-horizontal'>
    <dt>distance</dt><dd>
      a numeric vector of distances from the pituitary to the
      pterygomaxillary fissure (mm).  These distances are measured
      on x-ray images of the skull.
    </dd>
    <dt>age</dt><dd>
      a numeric vector of ages of the subject (yr).
    </dd>
    <dt>Subject</dt><dd>
      an ordered factor indicating the subject on which the
      measurement was made.  The levels are labelled <code>M01</code>
      to <code>M16</code> for the males and <code>F01</code> to <code>F13</code> for
      the females.  The ordering is by increasing average distance
      within sex.
    </dd>
    <dt>Sex</dt><dd>
      a factor with levels
      <code>Male</code> and
      <code>Female</code> 
    </dd>
  </dl>

Orthodont: Growth curve data on an orthdontic measurement

Description

Arguments

Format

Details

Examples