Z Score
1 General
- Type: - Matrix Processing
- Heading: - Normalization
- Source code: ZScore.cs
2 Brief description
The mean of each row/column is subtracted from each value. The result is then divided by the standard deviation of the row/column.
Output: Normalized expression matrix.
3 Parameters
3.1 Matrix access
Specifies whether the z-scoring is performed on rows or columns (default: Rows).
3.1.1 Grouping
This parameter is just relevant, if the “Matrix access” is set to “Rows”. It specifies, whether the normalization should be applied separately on groups (default:
3.2 Use median
If checked, the median and not the mean of each row/column is used for the calculation of the z-score of each matrix cell (default: unchecked).
3.3 Report mean and std. dev.
If checked, the mean and the standard deviation used for the calculation are reported (default: unchecked). In case the z-scoring is based on rows (“Matrix access” = “Rows”), the calculated mean and standard deviation appear in 2 newly generated numeric columns called “Mean” and “Std. dev.” containing the mean and standard deviation of each row. In case the calculation is based on columns (“Matrix access” = “Columns”), 2 new numeric rows are generated containing the mean and standard deviation of each column.
4 Parameter window
