laue chart padding

<la-cartesian
  :height="150"
  :width="300"
  :data="trend"
  :padding="[20, 0, 20, 0]" 
>
  <!-- 
	Similar CSS padding. 
	You can specify [up, right, bottom, left]
	by an array of numbers, 
	such as [0, 10, 20, n => n + 30]
  -->
  <la-line animated dot curve prop="v"></la-line>
  <la-tooltip></la-tooltip>
</la-cartesian>