Create SingleCellExperiment object from FLAMES output folder

Create SingleCellExperiment object from FLAMES output folder

Usage

create_sce_from_dir(outdir, annotation, quantification = "FLAMES")

Arguments

outdir: The folder containing FLAMES output files
annotation: the annotation file that was used to produce the output files
quantification: (Optional) the quantification method used to generate the output files (either "FLAMES" or "Oarfish".). If not specified, the function will attempt to determine the quantification method.

Value

a list of SingleCellExperiment objects if multiple transcript matrices were found in the output folder, or a SingleCellExperiment object if only one were found

Examples

outdir <- tempfile()
dir.create(outdir)
bc_allow <- file.path(outdir, "bc_allow.tsv")
genome_fa <- file.path(outdir, "rps24.fa")
R.utils::gunzip(
  filename = system.file("extdata", "bc_allow.tsv.gz", package = "FLAMES"),
  destname = bc_allow, remove = FALSE
)
R.utils::gunzip(
  filename = system.file("extdata", "rps24.fa.gz", package = "FLAMES"),
  destname = genome_fa, remove = FALSE
)
annotation <- system.file("extdata", "rps24.gtf.gz", package = "FLAMES")

sce <- sc_long_pipeline(
  genome_fa = genome_fa,
  fastq = system.file("extdata", "fastq", "musc_rps24.fastq.gz", package = "FLAMES"),
  annotation = annotation,
  outdir = outdir,
  barcodes_file = bc_allow,
  config_file = create_config(outdir, oarfish_quantification = FALSE)
)
#> Writing configuration parameters to:  /tmp/RtmpgpEV0i/file25bfae1bd27/config_file_9663.json 
#> Configured steps: 
#> 	barcode_demultiplex: TRUE
#> 	genome_alignment: TRUE
#> 	gene_quantification: TRUE
#> 	isoform_identification: TRUE
#> 	read_realignment: TRUE
#> 	transcript_quantification: TRUE
#> samtools not found, will use Rsamtools package instead
#> Running step: barcode_demultiplex
#> FLEXIPLEX 0.96.2
#> Setting max barcode edit distance to 2
#> Setting max flanking sequence edit distance to 8
#> Setting read IDs to be  replaced
#> Setting number of threads to 8
#> Search pattern: 
#> primer: CTACACGACGCTCTTCCGATCT
#> BC: NNNNNNNNNNNNNNNN
#> UMI: NNNNNNNNNNNN
#> polyT: TTTTTTTTT
#> Setting known barcodes from /tmp/RtmpgpEV0i/file25bfae1bd27/bc_allow.tsv
#> Number of known barcodes: 143
#> Processing file: /__w/_temp/Library/FLAMES/extdata/fastq/musc_rps24.fastq.gz
#> Searching for barcodes...
#> Number of reads processed: 393
#> Number of reads where at least one barcode was found: 368
#> Number of reads with exactly one barcode match: 364
#> Number of chimera reads: 1
#> All done!
#> Running step: genome_alignment
#> Creating junction bed file from GFF3 annotation.
#> Aligning sample /tmp/RtmpgpEV0i/file25bfae1bd27/matched_reads.fastq -> /tmp/RtmpgpEV0i/file25bfae1bd27/align2genome.bam
#> Your fastq file appears to have tags, but you did not provide the -y option to minimap2 to include the tags in the output.
#> Warning: samtools not found, using Rsamtools instead, this could be slower and might fail for large BAM files.
#> Sorting BAM files by genome coordinates with 8 threads...
#> Indexing bam files
#> Running step: gene_quantification
#> 03:22:27 AM Wed May 21 2025 quantify genes 
#> Found genome alignment file(s): 	align2genome.bam
#> Running step: isoform_identification
#> Import genomic features from the file as a GRanges object ... 
#> OK
#> Prepare the 'metadata' data frame ... 
#> OK
#> Make the TxDb object ... 
#> Warning: genome version information is not available for this TxDb object
#> OK
#> Running step: read_realignment
#> Checking for fastq file(s) /__w/_temp/Library/FLAMES/extdata/fastq/musc_rps24.fastq.gz
#> 	files found
#> Checking for fastq file(s) /tmp/RtmpgpEV0i/file25bfae1bd27/matched_reads.fastq
#> 	files found
#> Checking for fastq file(s) /tmp/RtmpgpEV0i/file25bfae1bd27/matched_reads_dedup.fastq
#> 	files found
#> Realigning sample /tmp/RtmpgpEV0i/file25bfae1bd27/matched_reads_dedup.fastq -> /tmp/RtmpgpEV0i/file25bfae1bd27/realign2transcript.bam
#> Your fastq file appears to have tags, but you did not provide the -y option to minimap2 to include the tags in the output.
#> Warning: samtools not found, using Rsamtools instead, this could be slower and might fail for large BAM files.
#> Sorting BAM files by genome coordinates with 8 threads...
#> Indexing bam files
#> Running step: transcript_quantification
#> 03:22:28 AM Wed May 21 2025 quantify transcripts 
#> Warning: Annotation in GFF format may cause errors. Please consider using GTF formats.
#> Found realignment file(s): 	realign2transcript.bam
#> Pipeline saved to /tmp/RtmpgpEV0i/file25bfae1bd27/pipeline.rds
sce_2 <- create_sce_from_dir(outdir, annotation)