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SplitBy

SplitBy[list, f]
splits list into sublists consisting of runs of successive elements that give the same value when f is applied.
SplitBy[list, {f1, f2, ...}]
recursively splits list into sublists by testing elements successively with each of the fi.
  • SplitBy[list, ...] splits but does not rearrange list.
  • SplitBy performs comparisons only on adjacent pairs of elements.
  • SplitBy[list] is equivalent to SplitBy[list, Identity], which is also equivalent to Split[list].
  • SplitBy[list, {f1, f2}] is equivalent to Map[SplitBy[#, f2]&, SplitBy[list, f1]].
Split into runs of numbers with identical integer part:
Split into runs of triples with identical first component:
Split first by their first component and then by their second:
Split dates into runs with identical year:
Split into runs of numbers with identical integer part:
In[1]:=
Click for copyable input
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Split into runs of triples with identical first component:
In[1]:=
Click for copyable input
Out[1]=
Split first by their first component and then by their second:
In[2]:=
Click for copyable input
Out[2]=
 
Split dates into runs with identical year:
In[1]:=
Click for copyable input
Out[1]=
In[2]:=
Click for copyable input
Out[2]=
New in 7