Bar Charts

Bar chart with labels

string[] products = ["Alpha", "Beta", "Gamma", "Delta"];
double[] sales    = [12_500, 34_800, 8_200, 27_600];

Plt.Create()
    .AddSubPlot(1, 1, 1, ax => ax
        .WithTitle("Sales by Product")
        .SetYLabel("Revenue ($)")
        .Bar(products, sales, bar => { bar.Color = Colors.Tab10Blue; bar.Label = "Q1 Sales"; })
        .WithBarLabels("F0")
        .SetYTickFormatter(new EngFormatter()))
    .Save("bar_labels.svg");

Horizontal bars

Plt.Create()
    .AddSubPlot(1, 1, 1, ax => ax
        .Bar(products, sales, s =>
        {
            s.Orientation = BarOrientation.Horizontal;
            s.Color = Colors.Teal;
        })
        .WithBarLabels())
    .Save("bar_horizontal.svg");

Stacked bars

Plt.Create()
    .AddSubPlot(1, 1, 1, ax => ax
        .SetBarMode(BarMode.Stacked)
        .Bar(products, q1, s => { s.Color = Colors.Tab10Blue; s.Label = "Q1"; })
        .Bar(products, q2, s => { s.Color = Colors.Orange;    s.Label = "Q2"; })
        .Bar(products, q3, s => { s.Color = Colors.Green;     s.Label = "Q3"; })
        .WithLegend()
        .WithBarLabels())
    .Save("bar_stacked.svg");

Grouped bars

Plt.Create()
    .AddSubPlot(1, 1, 1, ax => ax
        .SetBarMode(BarMode.Grouped)
        .Bar(products, q1, s => { s.Color = Colors.CornflowerBlue; s.Label = "Q1"; })
        .Bar(products, q2, s => { s.Color = Colors.Salmon;         s.Label = "Q2"; })
        .WithLegend(LegendPosition.UpperLeft))
    .Save("bar_grouped.svg");

Bar width, edge color, and alpha

Plt.Create()
    .AddSubPlot(1, 1, 1, ax => ax
        .Bar(products, sales, s =>
        {
            s.Color = Colors.CornflowerBlue;
            s.EdgeColor = Colors.Navy;
            s.LineWidth = 1.5;
            s.BarWidth = 0.5;   // narrower bars (default 0.8)
            s.Alpha = 0.7;
            s.Align = BarAlignment.Center;
        }))
    .Save("bar_styled.svg");

Hatching patterns

Add texture to bars for print-friendly charts:

Plt.Create()
    .AddSubPlot(1, 1, 1, ax => ax
        .Bar(products, q1, s =>
        {
            s.Color = Colors.LightBlue;
            s.Hatch = HatchPattern.Slash;
            s.HatchColor = Colors.DarkBlue;
            s.Label = "Q1";
        })
        .Bar(products, q2, s =>
        {
            s.Color = Colors.LightCoral;
            s.Hatch = HatchPattern.BackslashDouble;
            s.HatchColor = Colors.DarkRed;
            s.Label = "Q2";
        })
        .WithLegend())
    .Save("bar_hatched.svg");

Bar labels with custom format

Plt.Create()
    .AddSubPlot(1, 1, 1, ax => ax
        .Bar(products, sales, s =>
        {
            s.ShowLabels = true;
            s.LabelFormat = "C0";  // currency format
        }))
    .Save("bar_custom_labels.svg");

Fluent API reference — BarSeries

Property	Type	Default	Description
Color	Color	auto	Bar fill color
EdgeColor	Color	auto	Bar outline color
LineWidth	double	0.5	Outline width
BarWidth	double	0.8	Width as fraction
Orientation	BarOrientation	Vertical	Vertical or Horizontal
Align	BarAlignment	Center	Center or Edge
Alpha	double	1.0	Transparency (0–1)
Hatch	HatchPattern	None	Slash, Backslash, Dash, Pipe, CrossHash, ...
HatchColor	Color	auto	Hatch pattern color
ShowLabels	bool	false	Display value labels
LabelFormat	string	"G4"	.NET format string for labels
Label	string	none	Legend label

Axes method	Description
.SetBarMode(BarMode.Stacked)	Stack multiple bar series
.SetBarMode(BarMode.Grouped)	Side-by-side grouped bars
.WithBarLabels(format?)	Show value labels on last bar

Pareto chart

string[] defects = ["Scratches", "Dents", "Cracks", "Stains", "Breaks", "Missing", "Warp"];
double[] counts = [142, 98, 67, 45, 31, 18, 9];
double total = counts.Sum();
double running = 0;
double[] cumPct = counts.Select(c => { running += c; return running / total * 100; }).ToArray();
double[] barCenters = Enumerable.Range(0, defects.Length).Select(i => i + 0.5).ToArray();

Plt.Create()
    .WithTitle("Pareto Chart — Defect Analysis")
    .WithSize(900, 500)
    .AddSubPlot(1, 1, 1, ax => ax
        .Bar(defects, counts, s => { s.Color = Color.FromHex("#4472C4"); s.Label = "Count"; })
        .WithSecondaryYAxis(y2 => y2
            .Plot(barCenters, cumPct, s => { s.Color = Color.FromHex("#8B0000"); s.LineWidth = 2; s.Marker = MarkerStyle.Circle; s.Label = "Cumulative %"; })
            .SetYLim(0, 100)
            .SetYLabel("Cumulative %"))
        .SetYLabel("Defect Count")
        .WithLegend())
    .Save("pareto_chart.svg");

Lollipop chart

// Products at indices 0-5
double[] scores = [82.5, 67.3, 91.1, 54.8, 76.4, 88.2];
double[] xIdx = Enumerable.Range(0, scores.Length).Select(i => (double)i).ToArray();

Plt.Create()
    .WithTitle("Lollipop Chart — Product Scores")
    .WithSize(800, 450)
    .AddSubPlot(1, 1, 1, ax => ax
        .Stem(xIdx, scores, s => { s.StemColor = Color.FromHex("#5B9BD5"); })
        .Scatter(xIdx, scores, s => { s.Color = Color.FromHex("#5B9BD5"); s.MarkerSize = 14; s.Marker = MarkerStyle.Circle; })
        .SetYLim(0, 110)
        .SetYLabel("Score"))
    .Save("lollipop_chart.svg");

Monthly P&L waterfall

string[] months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", "Total"];
double[] pnl = [120, -45, 80, -30, 95, 60, -20, 110, -55, 75, 40, 130, 0];
pnl[12] = pnl[..12].Sum();

Plt.Create()
    .WithTitle("Monthly P&L Waterfall")
    .WithSize(1100, 500)
    .AddSubPlot(1, 1, 1, ax => ax
        .Waterfall(months, pnl, s =>
        {
            s.IncreaseColor = Color.FromHex("#2ECC71");
            s.DecreaseColor = Color.FromHex("#E74C3C");
            s.TotalColor = Color.FromHex("#3498DB");
            s.BarWidth = 0.6;
        })
        .SetYLabel("P&L (€k)")
        .WithXTickLabelRotation(30))
    .Save("waterfall_pnl.svg");