Charts at a glance

Every chart on this page is a live, executable cell: a handful of in-RAM values, one fluent Charts.* call, and the rendered chart beneath it. Each cell opens with the prompt that would produce it — the exact sentence you could hand an agent to get this chart back as a code cell. The API lives in MeshWeaver.Layout.Chart (ChartControl family); for slicing a dataset into series first, see the pivot side in Pivot tricks.

Column — compare categories

Prompt: "Show me quarterly revenue for this year as a column chart."

using MeshWeaver.Layout.Chart;

// Four quarters of revenue (CHF k) — plain arrays are all a chart needs.
var revenue = new double[] { 480, 520, 610, 730 };
var quarters = new[] { "Q1", "Q2", "Q3", "Q4" };

Charts.Column(revenue, quarters, "Revenue (CHF k)")
    .WithTitle("Quarterly revenue")

Bar — compare categories with long labels

Prompt: "Rank our product lines by units sold, horizontal bars so the names stay readable."

using MeshWeaver.Layout.Chart;

var units = new double[] { 1240, 990, 640, 410 };
var products = new[] { "Espresso machines", "Grinders", "Filter kits", "Accessories" };

Charts.Bar(units, products, "Units sold")
    .WithTitle("Product lines by units")

Line — a trend over time

Prompt: "Plot monthly active users for the first half of the year as a line."

using MeshWeaver.Layout.Chart;

var mau = new double[] { 3.1, 3.4, 3.9, 4.6, 5.2, 6.0 };
var months = new[] { "Jan", "Feb", "Mar", "Apr", "May", "Jun" };

Charts.Line(mau, months, "MAU (k)")
    .WithTitle("Monthly active users")

Pie — shares of a whole

Prompt: "What's our traffic split by channel? Pie chart, one slice per channel."

using MeshWeaver.Layout.Chart;

var visits = new double[] { 44, 27, 18, 11 };
var channels = new[] { "Organic", "Paid", "Referral", "Direct" };

Charts.Pie(visits, channels)
    .WithTitle("Traffic by channel")

Stacked column — two dimensions in one chart

For two dimensions — categories on the axis, a second dimension stacked inside each column — slice the rows first, then chart the slices. This is the same SliceBy pipeline the data-cube pages build on.

Prompt: "Break revenue down by region AND year: one column per year, stacked by region."

using MeshWeaver.Layout.Chart;

record Sale(string Region, string Year, double Amount);

var sales = new[]
{
    new Sale("EMEA", "2024", 320), new Sale("EMEA", "2025", 390),
    new Sale("Americas", "2024", 280), new Sale("Americas", "2025", 335),
    new Sale("APAC", "2024", 150), new Sale("APAC", "2025", 205),
};

sales
    .SliceBy(s => s.Year)     // one column per year
    .SliceBy(s => s.Region)   // stacked by region inside each column
    .ToStackedColumnChart(g => g.Sum(s => s.Amount))
    .WithTitle("Revenue by year, stacked by region (CHF k)")

Swap ToStackedColumnChart for ToColumnChart (grouped columns), ToBarChart / ToStackedBarChart (horizontal), or ToLineChart (one line per slice) — the slicing stays identical.

Try these in the Agentic Engineering exercises.