Re: Definition of the similarity in a set of integers

*To*: mathgroup at smc.vnet.net*Subject*: [mg96425] Re: [mg96380] Definition of the similarity in a set of integers*From*: Curtis Osterhoudt <cfo at lanl.gov>*Date*: Fri, 13 Feb 2009 03:44:18 -0500 (EST)*Organization*: LANL*References*: <200902121140.GAA08584@smc.vnet.net>*Reply-to*: cfo at lanl.gov

Perhaps something like this: (* if no very small numbers appear in the sets, and if they're of the same length *) s1 = {25, 14, 32, 45}; s2 = {26, 12, 31, 48}; In[12]:= (N[1]/Length[s1])*Total[s1/s2] Out[12]= 1.0244907981803144 In[14]:= s3 = {25, 1, 1, 1}; s4 = {1, 1, 25, 1}; In[15]:= (N[1]/Length[s3])*Total[s3/s4] Out[15]= 6.76 Otherwise, a cross-correlation might have to be done. Hope that helps, C.O. On Thursday 12 February 2009 04:40:42 am Ryan Markley wrote: > Hello I have two sets of integers eg > > S1 = (25,14,32,45) and S2 = (26,12,31,48) > > I want to define an operation similar to the variance that give me how > similar both sets are, for example in the above example for both sets > the results I have to get need to be similar because both sets are > similar. > > The problem with the variance is this > > S1 = (25,1,1,1) and S2 = (1,1,25,1) these two sets have the same > variance but they are completly different. What mathematical operation > can I use to do what I am looking for. > > Thanks a lot in advance. > > -- ========================================================== Curtis Osterhoudt cfo at remove_this.lanl.and_this.gov PGP Key ID: 0x4DCA2A10 Please avoid sending me Word or PowerPoint attachments See http://www.gnu.org/philosophy/no-word-attachments.html ==========================================================

**References**:**Definition of the similarity in a set of integers***From:*Ryan Markley <overgeo@gmail.com>