# Plot Means for One or Two-Way Layout

### Description

Plots cell means for a numeric variable in each category of a factor or in each combination of categories of two factors, optionally along with error bars based on cell standard errors or standard deviations.

### Usage

1 2 3 4 5 6 | ```
plotMeans(response, factor1, factor2,
error.bars = c("se", "sd", "conf.int", "none"), level=0.95,
xlab = deparse(substitute(factor1)),
ylab = paste("mean of", deparse(substitute(response))),
legend.lab = deparse(substitute(factor2)), main = "Plot of Means",
pch = 1:n.levs.2, lty = 1:n.levs.2, col = palette(), ...)
``` |

### Arguments

`response` |
Numeric variable for which means are to be computed. |

`factor1` |
Factor defining horizontal axis of the plot. |

`factor2` |
If present, factor defining profiles of means |

`error.bars` |
If |

`level` |
level of confidence for confidence intervals; default is .95 |

`xlab` |
Label for horizontal axis. |

`ylab` |
Label for vertical axis. |

`legend.lab` |
Label for legend. |

`main` |
Label for the graph. |

`pch` |
Plotting characters for profiles of means. |

`lty` |
Line types for profiles of means. |

`col` |
Colours for profiles of means |

`...` |
arguments to be passed to |

### Value

The function invisibly returns `NULL`

.

### Author(s)

John Fox jfox@mcmaster.ca

### See Also

`interaction.plot`

### Examples

1 |