block6.cs

// plot median house value by latitude and longitude
var chart = Chart.Plot(
    new Graph.Scattergl()
    {
        x = houses.Select(v => v.Longitude),
        y = houses.Select(v => v.Latitude),
        mode = "markers",
        marker = new Graph.Marker()
        {
            color = houses.Select(v => v.MedianHouseValue),
            colorscale = "Jet"
        }
    }
);
chart.WithXTitle("Longitude");
chart.WithYTitle("Latitude");
chart.WithTitle("Median house value by location");
chart.Width = 600;
chart.Height = 600;
display(chart);