block9.cs

// get an array of housing data
houses = context.Data.CreateEnumerable<HouseBlockData>(data, reuseRowObject: false).ToArray();

// plot median house value by median income
chart = Chart.Plot(
    new Graph.Scattergl()
    {
        x = houses.Select(v => v.MedianIncome),
        y = houses.Select(v => v.MedianHouseValue),
        mode = "markers"
    }
);
chart.WithXTitle("Median Income");
chart.WithYTitle("Median House Value");
chart.WithTitle("Median house value by income");
chart.Width = 600;
chart.Height = 600;
display(chart);