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Level
Level[
expr
,
levelspec
] gives a list of all subexpressions of expr on levels specified by levelspec.
Level[
expr
,
levelspec
,
f
] applies f to the list of subexpressions.
Level uses the standard level specification described in Section A.3.6.
Level[
expr
,
-1
] gives a list of all "atomic" objects in expr.
Level traverses expressions in depth-first order, so that the subexpressions in the final list are ordered lexicographically by their indices.
See the Mathematica book: Section 2.1.7.
See also: Apply, Map, Scan.
Further Examples
Here are the subexpressions of the polynomial at the first four levels.
In[1]:= 
Out[1]= 
Here are the subexpressions of the polynomial at the first four levels.
In[2]:= 
Out[2]= 
Here are the subexpressions of the polynomial at the first four levels.
In[3]:= 
Out[3]= 
Here are the subexpressions of the polynomial at the first four levels.
In[4]:= 
Out[4]= 
THIS IS DOCUMENTATION FOR AN OBSOLETE PRODUCT. SEE THE DOCUMENTATION CENTER FOR THE LATEST INFORMATION. | | | |
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