directional derivative

• 1. 方向导数: directional derivative | directional | Richtungsableitung
• 2. 求样条函数的方向导数: fndir
• 3. 广义方向导数: Generalized directional derivative

更多释义

• 1.它其实是那个方向的方向导数。
  Well, it's actually the directional derivative in that direction.
  dict.yoduao.com
• 2.基本上是的，那就是方向导数。
  And that's basically, yes, that's the directional derivative.
  dict.yoduao.com
• 3.垂直于梯度的方向上,方向导数为零。
  The directional derivative in a direction that's perpendicular to the gradient is basically zero.
  dict.yoduao.com

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