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@@ -50,6 +50,8 @@
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" pollutant_releases['Lat'],\n",
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" ),\n",
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")\n",
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+ "for column_name in pollutant_releases_geo.select_dtypes('object'):\n",
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+ " pollutant_releases_geo[column_name] = pollutant_releases_geo[column_name].astype('category')\n",
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"pollutant_releases_geo.head()"
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]
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},
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@@ -69,13 +71,13 @@
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"Lat 652351 non-null float64\n",
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"Long 652351 non-null float64\n",
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"ReportingYear 652351 non-null int64\n",
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- "PollutantName 652351 non-null object\n",
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- "PollutantGroupName 652351 non-null object\n",
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+ "PollutantName 652351 non-null category\n",
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+ "PollutantGroupName 652351 non-null category\n",
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"TotalQuantity 652351 non-null float64\n",
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"TotalQuantity 652351 non-null float64\n",
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"geometry 652351 non-null geometry\n",
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- "dtypes: float64(4), geometry(1), int64(2), object(2)\n",
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- "memory usage: 44.8+ MB\n"
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+ "dtypes: category(2), float64(4), geometry(1), int64(2)\n",
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+ "memory usage: 36.1 MB\n"
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]
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}
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],
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