Transpose

Transpose[mat] transposes the first two levels of mat

Attributes[Transpose] := {Protected}

Simple examples

In[1]:= Transpose[{a, b}]
Out[1]= Transpose[{a, b}]

In[2]:= Transpose[{{a}, {b}}]
Out[2]= {{a, b}}

In[3]:= Transpose[{{a, b}}]
Out[3]= {{a}, {b}}

In[4]:= Transpose[{{{a}, {b}}}]
Out[4]= {{{a}}, {{b}}}

In[5]:= Transpose[a]
Out[5]= Transpose[a]