Description Usage Arguments Details Value Author(s) See Also Examples
This function gets SRA .sra file information from NCBI SRA ftp site for a given list SRA accessions.
1 | getSRAinfo( in_acc, sra_con, sraType = 'sra' )
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in_acc |
character vector of SRA accessions, which should be in same SRA data type, either submission, study, sample, experiment or run. |
sra_con |
connection to the SRAmetadb SQLite database |
sraType |
type of SRA data files, which should be 'sra' ('litesra' has phased out ). |
The function first gets ftp addressed of sra or sra-lite data files with function listSRAfile
and then get file size and date from NCBI SRA ftp sites.
A data.frame of ftp addresses of SRA data files, and file size and date along with input SRA accessions.
Jack Zhu <zhujack@mail.nih.gov>
1 2 3 4 5 6 7 8 9 10 | ## Using the SRAmetadb demo database
library(SRAdb)
sra_dbname <- file.path(system.file('extdata', package='SRAdb'), 'SRAmetadb_demo.sqlite')
sra_con <- dbConnect(dbDriver("SQLite"), sra_dbname)
## Get file size and date from NCBI ftp site for available fastq files associated with "SRS012041","SRS000290"
# getSRAinfo (in_acc=c("SRS012041","SRS000290"), sra_con=sra_con, sraType='sra')
## The actual SRAmetadb sqlite database can be downloaded using function: getSRAdbFile. Warning: the actual SRAmetadb sqlite database is pretty large (> 35GB as of May, 2018) after uncompression. So, downloading and uncompressing of the actual SRAmetadb sqlite could take quite a few minutes depending on your network bandwidth. Direct links for downloading the SRAmetadb sqlite database: https://s3.amazonaws.com/starbuck1/sradb/SRAmetadb.sqlite.gz https://gbnci-abcc.ncifcrf.gov/backup/SRAmetadb.sqlite.gz
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