Choice of peak caller

[CharlotteAnne]

Clippy should be default peak caller, but users should be able to choose between paralcu, clippy and icount at run time - similar to how they can choose the specific genome version they want to use. choice of peak caller impacts downstream outputs that depend on peak calling, namely peka.

[samirelanduk]

As in it should be inferred from the annotation sheet, or there should be a dropdown on the iMaps page? I think the latter makes more sense.

[CharlotteAnne]

Dropdown on imaps page definately, but ideally both genome, peak caller and any other params would be hidden in an "advanced" tab with defaults set. for genome we have a default, for peak caller the default would be clippy