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Student Support Forum > General > > "Extract numbers from list"

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Please answer this:2+1 =



Original Message (ID '78201') By Bill Simpson:
If list={first,second...} then Map[f,list] will create {f[first],f[second]...} for all the items in list. So In[1]:= data={{x,y},{c,v}}; Map[First,data] Out[2]= {x,c} Study http://reference.wolfram.com/mathematica/ref/Map.html