alignExpr | R Documentation |

Multiplies genes (columns) in given expression data such that their correlation with given reference vector is non-negative.

```
alignExpr(datExpr, y = NULL)
```

`datExpr` |
expression data to be aligned. A data frame with columns corresponding to genes and rows to samples. |

`y` |
reference vector of length equal the number of samples (rows) in |

The function basically multiplies each column in `datExpr`

by the sign of its correlation with
`y`

. If `y`

is not given, the first column in `datExpr`

will be used as the reference
vector.

A data frame containing the aligned expression data, of the same dimensions as the input data frame.

Steve Horvath and Peter Langfelder

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