I'm using spp package for Chip-seq data so while reading the bam files, the data is showing three elements
1. tags, 2. flen and 3. quality
What is flen ?
Fragment length, which is also known as template length.
While calling peak it is creating problem
I am using spp package for peak calling and it is not giving binding characterstics
SPP is relatively obscure, with few people outside of ENCODE ever using it. Try a more common peak caller like MACS2 or SICER.