HADD

Combine ntuples using the ROOT hadd command line tool

URL: https://root.cern/doc/master/hadd_8cxx.html

Example

This wrapper can be used in the following way:

rule hadd:
    input:
        expand("ntuple{n}.root", n=range(3)),
    log:
        "logs/hadd/hadd.log",
    params:
        extra="-f5",
    threads: 2
    output:
        "ntuple.root",
    wrapper:
        "v3.8.0/phys/root/hadd"

Note that input, output and log file paths can be chosen freely.

When running with

snakemake --use-conda

the software dependencies will be automatically deployed into an isolated environment before execution.

Software dependencies

• ROOT>6.24.0

Input/Output

Input:

• ROOT files to be combined.

Output:

• single ROOT file containing contents of input files.

Params

• extra: extra parameters to hadd (see ROOT documentation, e.g. -f[0-9] for compression levels)

Authors

• Jamie Gooding

Code

__author__ = "Jamie Gooding"
__copyright__ = "Copyright 2024, Jamie Gooding"
__email__ = "jamie.gooding@cern.ch"
__license__ = "MIT"


from snakemake.shell import shell

extra = snakemake.params.get("extra", "")
log = snakemake.log_fmt_shell()

shell("hadd -j {snakemake.threads} {extra} {snakemake.output} {snakemake.input} {log}")