Given a list-like first argument, this function extracts one or more of its elements. Numeric and character indexing are allowed.
indexList(list, index = NULL)
If index
is NULL
, the whole list is returned.
Otherwise, if index
has length one, the corresponding element is
extracted and returned. Otherwise a list containing the requested subset
is returned.
A list-like object, with a [[
indexing method.
A vector of integers or strings, or NULL
.
Jon Clayden
Please cite the following reference when using TractoR in your work:
J.D. Clayden, S. Muñoz Maniega, A.J. Storkey, M.D. King, M.E. Bastin & C.A. Clark (2011). TractoR: Magnetic resonance imaging and tractography with R. Journal of Statistical Software 44(8):1-18. https://www.jstatsoft.org/v44/i08/.