doc/hidden-cells.ipynb

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    "# Hidden Cells\n",
    "\n",
    "You can remove cells from the HTML/LaTeX output by adding this to the cell metadata:\n",
    "\n",
    "```json\n",
    "\"nbsphinx\": \"hidden\"\n",
    "```\n",
    "\n",
    "Hidden cells are still executed but removed afterwards.\n",
    "\n",
    "For example, the following hidden cell defines the variable `answer`."
   ]
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   "source": [
    "answer = 6 * 7"
   ]
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   "cell_type": "markdown",
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   "source": [
    "This is the cell after the hidden cell.\n",
    "Although the previous cell is not visible, its result is still available:"
   ]
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   "cell_type": "code",
   "execution_count": null,
   "metadata": {
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   "source": [
    "answer"
   ]
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   "cell_type": "markdown",
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   "source": [
    "Don't overuse this, because it may make it harder to follow what's going on in your notebook.\n",
    "\n",
    "Also Markdown cells can be hidden.\n",
    "The following cell is hidden."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "nbsphinx": "hidden"
   },
   "source": [
    "I am a *hidden* Markdown cell!"
   ]
  }
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