column subsetting deletes dimnames of the layer matrix

[akhst7]

I did the column subsetting as follows and checked str() of layers ;

nt<-intersect(selected.genes, colnames(ann))
ann.mini<-ann[, int]
str(ann.mini)
str(ann.mini$layers)
List of 2
 $ spliced  :Formal class 'dgRMatrix' [package "Matrix"] with 6 slots
  .. ..@ p       : int [1:9083] 0 2487 2815 4760 5115 6431 9226 10608 12898 13826 ...
  .. ..@ j       : int [1:13011806] 11 19 20 34 43 44 47 50 71 78 ...
  .. ..@ Dim     : int [1:2] 9082 18775
  .. ..@ Dimnames:List of 2
  .. .. ..$ : NULL
  .. .. ..$ : NULL
  .. ..@ x       : num [1:13011806] 1 1 1 2 4 1 5 1 5 3 ...
  .. ..@ factors : list()
 $ unspliced:Formal class 'dgRMatrix' [package "Matrix"] with 6 slots
  .. ..@ p       : int [1:9083] 0 1508 1614 2739 3136 4047 5677 6279 7397 8016 ...
  .. ..@ j       : int [1:6962033] 2 9 15 20 24 27 33 34 46 50 ...
  .. ..@ Dim     : int [1:2] 9082 18775
  .. ..@ Dimnames:List of 2
  .. .. ..$ : NULL
  .. .. ..$ : NULL
  .. ..@ x       : num [1:6962033] 1 1 1 1 1 1 2 2 1 2 ...
  .. ..@ factors : list()

This is not a major problem since I can easily restore dimnames of the layers but is this a bug or normal behavior of the ann obj subsetting ?

[rcannood]

Thanks @akhst7! The latest commit to the master branch should solve this issue.