getDataLabels: Create a vector with labels for plot series
Description
For scatter plots labels correspond to rows of the data (names, values, indices, etc.). For
non-scatter plots labels correspond to the columns (names, indices or max value for each column)
Usage
getDataLabels(ps, labels = NULL)
Arguments
ps
`plotseries` object
labels
vector with user defined labels or type of labels to show ("values", "names", "indices")