Polar Cardioid

const colors = [ "#428517", "#77D200", "#D6D305", "#EC8E19", "#C92B05"];

function App() {
  return (
    <VictoryChart polar
      theme={VictoryTheme.material}
      domain={{ y: [0, 10] }}
    >
      <VictoryPolarAxis dependentAxis
        style={{ axis: { stroke: "none" } }}
        tickFormat={() => ""}
      />
      <VictoryPolarAxis
        tickValues={[0, Math.PI / 2, Math.PI, (3 * Math.PI) / 2]}
        tickFormat={["2π", "π/2", "π", "3π/2"]}
        labelPlacement="vertical"
      />
      { [5, 4, 3, 2, 1].map((val, i) => {
        return (
          <VictoryLine
            key={i}
            samples={100}
            style={{ data: { stroke: colors[i] } }}
            y={(d) => val * (1 - Math.cos(d.x))}
          />
        );
      })}
    </VictoryChart>
  );
}

render(<App/>);