Hi Herve,


Thanks Herve,Steve and Michael..I really appreciate for the help.I have been able to get the summaries as explained by you.
As you can see below my result >viewSums(vl)
SimpleIntegerList of length 93
[["chr1"]] 556640 0 0 0 0 1085 3337 ... 209237 781 72987 154846 52256 168230[["chr10"]] 0 0 0 0 327 0 0 1065 0 0 0 ... 122 0 24495 29181 0 0 0 3337 0 14239


 >viewSums(vl)[["chr1"]]
   [1]  556640       0       0       0       0    1085    3337     355       0  [10]     497     445       0   17466    1065   34932    1065   27665    5251
However,while getting the names of the genes from gene_ranges,I am getting the following error.Do you have any idea about this?

 > genes<- unlist(gene_ranges,use.names=FALSE)
genesGRanges with 24774 ranges and 0 elementMetadata values              seqnames                 ranges strand   |                 <Rle>              <IRanges>  <Rle>   |    [1]          chr19 [ 58858172,  58864865]      -   |    [2]           chr8 [ 18248755,  18258723]      +   |    [3]          chr20 [ 43248163,  43280376]      -   |    [4]          chr18 [ 25530930,  25757445]      -   |    [5]           chr1 [243651535, 244006886]      -   |

  >names(genes) <- names(gene_ranges)
Error in `rownames<-`(`*tmp*`, value = c("1", "10", "100", "1000", "10000",  :   missing values not allowed in rownames



Thanks,Rohan




	[[alternative HTML version deleted]]

