get_data_value: Get data value
In specmine: Metabolomics and Spectral Data Analysis and Mining

Description Usage Arguments Value Examples

Get a data value given the x-axis labels and the sample

1	get_data_value(dataset, x.axis.val, sample, by.index = FALSE)

`dataset`	list representing the dataset from a metabolomics experiment.
`x.axis.val`	index or name of the x-axis value.
`sample`	index or name of the sample.
`by.index`	boolean value indicating if the x-axis value and sample are represented as index or not.

Returns a numeric with the data point value.

  ## Example of getting a data value from the dataset
  library(specmine.datasets)
  data(cachexia)
  data.value = get_data_value(cachexia, "Creatine", "PIF_178", 
	       by.index = FALSE)