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| using System; | ||
| using System.IO; | ||
| using System.Linq; | ||
| using Scikit.ML.DataFrame; | ||
| using OxyPlot; | ||
| using OxyPlot.Axes; | ||
| using OxyPlot.Series; | ||
| using Microsoft.ML.Runtime.Data; | ||
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| namespace GroupBy_Plot | ||
| { | ||
| class Program | ||
| { | ||
| static void Main(string[] args) | ||
| { | ||
| var df = DataFrame.ReadCsv("airquality.csv"); | ||
| Console.WriteLine("Shape: {0}", df.Shape); | ||
| Console.WriteLine("Columns: {0}", string.Join(",", df.Columns)); | ||
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| Console.WriteLine("df.iloc[0, 1] = {0}", df.iloc[0, 1]); | ||
| Console.WriteLine("df.loc[0, 'Ozone'] = {0}", df.loc[0, "Ozone"]); | ||
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| var monthColumn = df["Month"]; | ||
| var min = (double)(DvInt4)monthColumn.Aggregate(AggregatedFunction.Min).Get(0); // Syntax should be improved. | ||
| var max = (double)(DvInt4)monthColumn.Aggregate(AggregatedFunction.Max).Get(0); // Syntax should be improved. | ||
| df["MonthFrac"] = (df["Month"] - min) / (max - min); | ||
| Console.WriteLine("Head\n{0}", df.Head()); | ||
| var gr = df.GroupBy(new[] { "MonthFrac" }).Sum(); | ||
| Console.WriteLine("Grouped by MonthFrac\n{0}", gr); | ||
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| var gr2 = df.Drop(new[] { "Ozone", "Solar_R" }).Copy().GroupBy(new[] { "MonthFrac" }).Sum(); | ||
| Console.WriteLine("Grouped by MonthFrac, no Ozone\n{0}", gr2); | ||
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| var plot = new PlotModel { Title = "Simple Graph" }; | ||
| var serie = new ScatterSeries(); | ||
| serie.Points.AddRange(Enumerable.Range(0, gr.Shape.Item1).Select(i => new ScatterPoint((double)gr2.iloc[i, 0], (float)gr2.iloc[i, 2]))); | ||
| plot.Series.Add(serie); | ||
| plot.Axes.Add(new LinearAxis { Position = AxisPosition.Bottom, Title = gr2.Columns[0] }); | ||
| plot.Axes.Add(new LinearAxis { Position = AxisPosition.Left, Title = gr2.Columns[2] }); | ||
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| var plotString = SvgExporter.ExportToString(plot, 600, 400, true); | ||
| File.WriteAllText("graph2.svg", plotString); | ||
| } | ||
| } | ||
| } |
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| Tutorial to Scikit.ML.DataFrame | ||
| =============================== | ||
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| .. contents:: | ||
| :local: | ||
| :depth: 1 | ||
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| DataFrame + GroupBy + Svg Plot | ||
| ++++++++++++++++++++++++++++++ | ||
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| * `sln <DataFrameExample.sln>`_ | ||
| * `source <GroupBy_Plot/Program.cs>`_ | ||
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| Output: | ||
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| .. image:: simple_graph.png |
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