add preamble

Author: fedorov

notebooks/LIDC_viz_using_R.ipynb

@@ -4,7 +4,6 @@
   "metadata": {
     "colab": {
       "provenance": [],
-      "authorship_tag": "ABX9TyM9jTQ0hc+jStrVHeGloUl5",
       "include_colab_link": true
     },
     "kernelspec": {
@@ -23,13 +22,23 @@
         "colab_type": "text"
       },
       "source": [
-        "<a href=\"https://colab.research.google.com/github/denbonte/IDC-Tutorials/blob/colab-r/notebooks/LIDC_viz_using_R.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
+        "<a href=\"https://colab.research.google.com/github/ImagingDataCommons/IDC-Tutorials/blob/master/notebooks/LIDC_viz_using_R.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
       ]
     },
     {
       "cell_type": "markdown",
       "source": [
-        "# Using IDC Metadata from Colab/R"
+        "# Exploring IDC Metadata from Colab/R\n",
+        "\n",
+        "In this notebook you will learn how to search [NCI Imaging Data Commons](https://imaging.datacommons.cancer.gov) metadata catalog using R.\n",
+        "\n",
+        "This notebook was developed and tested in Google Colab, and may need additional refinements when used outside of Colab.\n",
+        "\n",
+        "In order to be able to run this notebook you must have a google account and a Google Cloud Project. You can learn how to create such a project in this tutorial: https://github.com/ImagingDataCommons/IDC-Tutorials/blob/master/notebooks/getting_started/part1_prerequisites.ipynb\n",
+        "\n",
+        "This notebook was developed by Dennis Bontempi.\n",
+        "\n",
+        "First release: Sept 2023"
       ],
       "metadata": {
         "id": "xiCt5TvTAJwJ"
@@ -68,7 +77,7 @@
       "metadata": {
         "id": "w6xW_tr2n5nD"
       },
-      "execution_count": 1,
+      "execution_count": 2,
       "outputs": []
     },
     {
@@ -92,16 +101,19 @@
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         "id": "xt4-1CiFnZA-",
-        "outputId": "fd4c3d69-7916-4c83-a167-685bd43561cb"
+        "outputId": "1a1d8f3b-4010-4d8a-8625-e0f6359cb5dc"
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-      "execution_count": 2,
+      "execution_count": 3,
       "outputs": [
         {
           "output_type": "stream",
           "name": "stderr",
           "text": [
             "Installing packages into ‘/usr/local/lib/R/site-library’\n",
             "(as ‘lib’ is unspecified)\n",
+            "\n",
+            "also installing the dependencies ‘assertthat’, ‘Rcpp’, ‘rapidjsonr’, ‘beeswarm’, ‘vipor’\n",
+            "\n",
             "\n"
           ]
         }
@@ -118,7 +130,7 @@
     },
     {
       "cell_type": "code",
-      "execution_count": 3,
+      "execution_count": null,
       "metadata": {
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@@ -186,7 +198,7 @@
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+      "execution_count": null,
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@@ -232,7 +244,7 @@
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+      "execution_count": null,
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@@ -257,7 +269,7 @@
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@@ -308,7 +320,7 @@
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@@ -436,7 +448,7 @@
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@@ -551,7 +563,7 @@
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@@ -607,7 +619,7 @@
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+      "execution_count": null,
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@@ -656,7 +668,7 @@
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-      "execution_count": 11,
+      "execution_count": null,
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@@ -709,7 +721,7 @@
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