Below is the official document of ShearingMatrix:
ShearingMatrix[[Theta],v,n] gives the matrix corresponding to shearing by [Theta] radians along the direction of the vector v, and normal to the vector n.
But in the following examples, I'm still confused about understanding this command:
In[47]:= ShearingMatrix[-Pi/4,{1,0},{0,1}]
ShearingMatrix[-Pi/4,{1,0},{1,1}]
Out[47]= {{1, -1}, {0, 1}}
Out[48]= {{1/2, -(1/2)}, {1/2, 3/2}}
Any comments/explanations will be appreciated.
Regards,
Zhao
