logic value to stop conversion if NA is introduced.
missing
type of handling NA mapping.
Value
return a gene symbols vector of given gene IDs.
There are three types of parameters for variable 'missing'. 'name' means the NA mapping values are replaced by their names. 'keep' means all of NA values are kept. 'remove' means all of NA values are removed.
References
Feng, G., Du, P., Krett, N., Tessel, M., Rosen, S., Kibbe, W.A. and Lin, S.M., 'A collection of bioconductor methods to visualize gene-list annotations', BMC Research Notes 2010, 3:10