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UnitVector

Status: Stable

documented, exercised by the test suite and/or worked examples, with no known limitations recorded.

Description

UnitVector[k]
    gives the 2-D unit vector in the k-th direction.
UnitVector[n, k]
    gives the n-D unit vector: a length-n list with a 1 in position k
    and 0s elsewhere.
Components are exact integers unless WorkingPrecision requests
MachinePrecision or a digit count.

Examples

All examples below are verified against the current Mathilda build.

In[1]:= UnitVector[1]
Out[1]= {1, 0}

In[2]:= UnitVector[3, 2]
Out[2]= {0, 1, 0}

In[3]:= UnitVector[2, WorkingPrecision -> MachinePrecision]
Out[3]= {0.0, 1.0}

Implementation notes

Attributes: Protected.

Implementation status

Stable — documented, exercised by the test suite and/or worked examples, with no known limitations recorded.

References