Hi guys,

My samtools version is: 0.1.19-44428cd

I am trying to use the '-s' option..

My bam file has:
samtools view Example.bam  | wc -l
2000000

samtools view -s 0.5 Example.bam  | wc -l
1001528
samtools view -s 1.5 Example.bam  | wc -l
998410
samtools view -s 2.5 Example.bam  | wc -l
998744

I cant understand the results..
-s 0.5 should produce exactly 1000000 reads
and 1.5 should be 3000000 etc..

Am i missing somthing?
Moreover,
samtools view -s 0.5 Example.bam > file1
samtools view -s 0.5 Example.bam > file2
file1 file2 are identical.. Isnt -s should be random subsampling???

Actually i saw this issue in some threads as solved, but it doesnt solve
for me..
https://github.com/samtools/samtools/issues/160  (for example)


Thanks,
Pap







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Dror Hibsh
0507-669599
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