<tool id="Show beginning1" name="Select first">

  <description>lines from a dataset</description>

  <command interpreter="perl">headWrapper.pl $input $lineNum $out_file1</command>

  <inputs>

    <param name="lineNum" size="5" type="integer" value="10" label="Select first" help="lines"/>

    <param format="txt" name="input" type="data" label="from"/>

  </inputs>

  <outputs>

    <data format="input" name="out_file1" metadata_source="input"/>

  </outputs>

  <tests>

    <test>

      <param name="lineNum" value="10"/>

      <param name="input" value="1.bed"/>

      <output name="out_file1" file="eq-showbeginning.dat"/>

    </test>

  </tests>

  <help>



**What it does**



This tool outputs specified number of lines from the **beginning** of a dataset



-----



**Example**



Selecting 2 lines from this::



    chr7  56632  56652  D17003_CTCF_R6  310  +

    chr7  56736  56756  D17003_CTCF_R7  354  +

    chr7  56761  56781  D17003_CTCF_R4  220  +

    chr7  56772  56792  D17003_CTCF_R7  372  +

    chr7  56775  56795  D17003_CTCF_R4  207  +



will produce::



    chr7  56632  56652  D17003_CTCF_R6  310  +

    chr7  56736  56756  D17003_CTCF_R7  354  +



  </help>

</tool>