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   "source": [
    "# h1chain\n",
    "Creates a TChain to be used by the h1analysis.C class\n",
    "the symbol H1 must point to a directory where the H1 data sets\n",
    "have been installed.\n",
    "\n",
    "\n",
    "\n",
    "\n",
    "**Author:** Rene Brun  \n",
    "<i><small>This notebook tutorial was automatically generated with <a href= \"https://github.com/root-project/root/blob/master/documentation/doxygen/converttonotebook.py\">ROOTBOOK-izer</a> from the macro found in the ROOT repository  on Tuesday, May 19, 2026 at 08:11 PM.</small></i>"
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   "source": [
    "TChain chain(\"h42\");"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "13569374",
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   "source": [
    " Arguments are defined. "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "c6d7f9cc",
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    "execution": {
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     "shell.execute_reply": "2026-05-19T20:11:18.399625Z"
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   "source": [
    "const char *h1dir = 0;"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "id": "723aaf1c",
   "metadata": {
    "collapsed": false,
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   "outputs": [],
   "source": [
    "if (h1dir) {\n",
    "   gSystem->Setenv(\"H1\",h1dir);\n",
    "}\n",
    "chain.SetCacheSize(20*1024*1024);\n",
    "chain.Add(\"$H1/dstarmb.root\");\n",
    "chain.Add(\"$H1/dstarp1a.root\");\n",
    "chain.Add(\"$H1/dstarp1b.root\");\n",
    "chain.Add(\"$H1/dstarp2.root\");"
   ]
  }
 ],
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