indexTransform: Transform ranking index distribution.

In dmontaner/mdgsa: Multi Dimensional Gene Set Analysis.

Description

The function performs a transformation of the ranking index so that its distribution is suitable as independent variable of the logistic regression model.

Usage

indexTransform(index, method = "normalize")

Arguments

index	a ranking index; a numeric vector, matrix or data.frame.
method	transformation method. See details.

Details

Works for vector, matrices and data.frames. In the case of matrices the function transforms each column separately from the other ones.

Two methods are currently implemented:

- normalize:

transforms the index into quantiles of a normal distribution.

- standardize:

performs an statistical standardization by subtracting the mean and dividing by the standard deviation.

Value

A transformed index. Its class will be that of the the input object.

Author(s)

David Montaner [e-mail]

See Also

transferIndex, uvGsa, mdPat

Examples

myIndex <- runif (1000)
myTransformedIndex <- indexTransform (myIndex)
plot (myIndex, myTransformedIndex)

dmontaner/mdgsa documentation built on May 15, 2019, 9:35 a.m.