<LineChart
  xAxis={[{ data: xData, scaleType: 'point' }]}
  series={[{ data }]}
  height={200}
  margin={{ top: 10, bottom: 20 }}
/>
<LineChart
  xAxis={[{ data: xData, scaleType: 'point' }]}
  series={[{ data, connectNulls: true }]}
  height={200}
  margin={{ top: 10, bottom: 20 }}
/>