用MATLAB计算和绘制向量场、幅度场、拉格朗日张量场？

Given:
▪(x, y) coordinates of the reference and deformed points
▪Ref–reference points
▪Def–deformed points

    Task：

▪Calculate and plot the displacement field
include：Vector field and Magnitude field
▪Calculate and plot the Lagrangian strain field

其中：
ref为

def为

需要MATLAB的编程代码，谢谢！