biocore / qiime

Official QIIME 1 software repository. QIIME 2 (https://qiime2.org) has succeeded QIIME 1 as of January 2018.
GNU General Public License v2.0
285 stars 269 forks source link

split_libraries.py -- issue #2211

Open shrutidabral opened 6 years ago

shrutidabral commented 6 years ago

hi, I m using QIIME for OTU identification. I have raw paired fastq files.

i do not have any information of barcode and linker primer .So i decided to create a barcode file using extract_barcodes.py script. this command run sucessfully and as a result i got three files read1.fastq resd2.fastq and barcodes.fastq.

command i used is -- extract_barcodes.py --input_type barcode_paired_end -f CIM_R1.fastq -r CIM_R2.fastq --bc1_len 6 --bc2_len 8 -o parsed_barcodes/

my query is ---

  1. what is meaning of this --bc1_len 6 and --bc2_len 8 ? Its seems to be a length of barcode but how can i decide this is perfect lenght for my raw data.
  2. Now, how can i use these file in split_libraries.py script. i read the tutorial but i am not able to understand.
  3. can we run the whole process without having information of barcode and linkerprimer.?