Description Usage Arguments Details Value Author(s) See Also Examples

Use a (modified) t test to compare two groups

1 | ```
tTest(object, groups, probe2gene = TRUE)
``` |

`object` |
ExpressionSet object |

`groups` |
string indicating the name of the variable of the phenoData containing the group information |

`probe2gene` |
logical; if |

For multiple testing the `mt.rawp2adjp`

function of package
`multtest`

is used.

Object of class `"tTest"`

, a data frame with the following columns

`gSymbol` |
Gene Symbol |

`p` |
p-value of the difference between the groups |

`logRatio` |
Log ratio of the expression between the groups |

`pBH` |
p-value of the difference between the groups, with Benjamini-Hochberg multiplicity correction |

`tStat` |
Student t-statistic of the different between groups |

Willem Talloen, Tobias Verbeke

1 2 3 4 5 6 7 | ```
if (require(ALL)){
data(ALL, package = "ALL")
ALL <- addGeneInfo(ALL)
ALL$BTtype <- as.factor(substr(ALL$BT,0,1))
tTestRes <- tTest(object = ALL, groups = "BTtype", probe2gene = TRUE)
volcanoPlot(tTestRes)
}
``` |

Embedding an R snippet on your website

Add the following code to your website.

For more information on customizing the embed code, read Embedding Snippets.