apply_by_variable: Apply function to variables
In specmine: Metabolomics and Spectral Data Analysis and Mining

Description Usage Arguments Value Examples

Applies a function to the values of each variable

1 2	apply_by_variable(dataset, fn.to.apply, variables = NULL, variable.bounds = NULL, samples = NULL, ...)

`dataset`	list representing the dataset from a metabolomics experiment.
`fn.to.apply`	function to apply (e.g. mean, max, min).
`variables`	allows to define which variables to calculate the stats (if numbers, indexes are assumed).
`variable.bounds`	allow to define an interval of variables (if numeric).
`samples`	if defined restricts the application to a given set of samples.
`...`	additional parameters to apply function.

Returns a vector with the variables and the value of the applied function.

     ## Example of applying a function to variables
	 library(specmine.datasets)
     data(cachexia)
     apply.variables.result = apply_by_variable(cachexia, mean)