Re: How to find the index of a maximal element in a list?

*To*: mathgroup at smc.vnet.net*Subject*: [mg72985] Re: How to find the index of a maximal element in a list?*From*: Bill Rowe <readnewsciv at sbcglobal.net>*Date*: Sat, 27 Jan 2007 06:29:46 -0500 (EST)

On 1/25/07 at 6:19 AM, vsorana at yahoo.com (Valter Sorana) wrote: >I may have a mental block, but I cannot find anything better than >Position[listName,Max[listName]] >that traverses the list twice - once to find the maximum and once to >find where it is. >Isn't there a way to get both the index and the max value in one go? >(of course one could write a loop that does this, but I want to >avoid loops) Assuming you are using the current version of Mathematica (or at least version 4.1 and later) the function you want to use is Ordering, i.e. In[9]:= data = Table[Random[], {100}]; Ordering[data, -1] Out[10]= {47} In[11]:= Position[data, Max[data]] Out[11]= {{47}} -- To reply via email subtract one hundred and four