Description Usage Arguments Value Author(s) See Also Examples

`cell`

is similar to `confidence.ellipse`

in the `car`

package,
except that `cell`

returns the points to form the ellipse(s)
which must be plotted with `plot(...,type='l')`

or `lines(...)`

.
It currently has methods for `lm`

(`cell.default`

) and `glh`

objects.

1 2 3 4 5 6 7 8 9 10 11 | ```
cell(object, ...)
## Default S3 method:
cell(object, which.coef, levels = 0.95, Scheffe = FALSE, dfn = 2, center.pch = 19,
center.cex = 1.5, segments = 51, xlab, ylab, las = par("las"), col = palette()[2], lwd = 2, lty = 1,
add = FALSE, ...)
## S3 method for class 'glh'
cell(object, which.coef = 1:2, levels = 0.95, Scheffe = FALSE, dfn = 2, center.pch = 19,
center.cex = 1.5, segments = 51, xlab, ylab, las = par("las"), col = palette()[2], lwd = 2,
lty = 1, add = FALSE, ...)
``` |

`object` |
A |

`which.coef` |
Indices of the coefficients, from |

`levels` |
One or more values of the confidence coverage of the ellipse(s). |

`Scheffe` |
Whether to apply Scheffe correction for dimensionality of the hypothesis |

`dfn` |
The Scheffe dimension used to calculate the radii of the ellipse(s).
i.e., use |

`center.pch` |
Plotting character used to mark the center of the ellipse(s) |

`center.cex` |
Size of the plotting character |

`segments` |
Number of line segments used to generate the ellipse(s) |

`xlab` |
Label for the horizontal coefficient of the plot. |

`ylab` |
Label for the vertical coefficient of the plot. |

`las` |
Style of axis labels |

`col` |
Color for the ellipse(s) |

`lwd` |
Line width for the ellipse(s) |

`lty` |
Line type for the ellipse(s) |

`add` |
This argument is not presently used |

`...` |
Other arguments passed down [where?] |

Returns an object of class `ell`

representing points on the boundaries of
the confidence ellipse(s).

Georges Monette

`ell`

, for details on `ell`

objects

1 | ```
# None yet
``` |

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