Hello, I am grouping a set of samples by sample, which I do by the following: SAMTOOLS_MERGE.out.bam.mix(CREATEREADNUM.out.readnum).mix(CLIPPER.out.bed) .groupTuple(by: [0]) .map { meta,result → [meta, meta.sample, result[0], result[1], result[2] ]} .groupTuple(by: [1]) .map { result → […

Hi @ramirobarrantes . I have run into something similar before and think that maybe the sort argument of groupTuple() might help. Several sorting criteria are included by default, but you can also create custom sorting criteria if necessary. Here’s a link to the documentation ( Operators — Nextflow …

@mribeirodantas I will definitely be saving this snipped for future reference :sweat_smile:

THis is excellent, thank you!!!

How to sort tuples

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mribeirodantas (Marcel Ribeiro-Dantas) June 13, 2024, 3:57am 3

Adding to what @CarsonJM explained, this Nextflow snippet may help you achieve what you’re looking for

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How to sort tuples

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