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UnitVector

UnitVector[k]
gives the two-dimensional unit vector in the k^(th) direction.
UnitVector[n, k]
gives the n-dimensional unit vector in the k^(th) direction.
  • UnitVector[n, k] is a list of length n with a 1 in position k and 0s elsewhere.
The unit vector in the x direction in 2 dimensions:
In[1]:=
Click for copyable input
Out[1]=
 
The unit vector in the y direction in 3 dimensions:
In[1]:=
Click for copyable input
Out[1]=
New in 6