Description Usage Arguments Value

View source: R/ggTTestBetween.R

ggplot2 layer to perform a 2-sample t-test and plot the p-value between two samples in a bargraph. Used in conjunction with gg_bracket_between().

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`data` |
The dataframe used in the plot |

`sample_col` |
Column name of the samples in data |

`sample1` |
The first sample to be compared |

`sample2` |
The second sample to be compared |

`mean_col` |
Column name of the means of the observations. Usually the y-axis of the bargraph. |

`sd_col` |
Column name for standard deviations of the observations. |

`n_col` |
Column name for number of replicates in an observation. |

`group_col` |
Optional – Column name of the sample groups if applicable. Leave NA if there are no groups. |

`group1` |
Optional – The group to which the first sample belongs. Leave NA if there are no groups. |

`group2` |
Optional – The group to which the second sample belongs. Leave NA if there are no groups. |

`equal.variance` |
Optional – Boolean for whether variances are equal. TRUE results in a student's t-test. FALSE results in a Welch test. Defaults to TRUE. |

`dodge.width` |
Optional – The width of position_dodge() in the ggplot if groups are present. Usually 0.9. |

`p_value_star` |
Optional – Boolean for whether to plot stars representing significance levels or actual p-values. TRUE plots '*'. FALSE plots p-values. '*' = p-value < 0.05, '**' = p-value < 0.01, '***' = p-value < 0.001, 'n.s.' = not significant. |

`extra_y_space` |
Optional – Numeric to adjust position of the bracket up or down from its default location. |

`...` |
Additional optional parameters/asthetics. e.g. color for font color or size for font size. |

ggplot2 annotation layer

azzoam/ggBrackets documentation built on June 4, 2017, 12:09 a.m.

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