Re: Ordering function weird?

*To*: mathgroup at smc.vnet.net*Subject*: [mg82678] Re: Ordering function weird?*From*: Bill Rowe <readnewsciv at sbcglobal.net>*Date*: Sun, 28 Oct 2007 04:02:18 -0500 (EST)

On 10/27/07 at 5:59 AM, claus.haslauer at web.de (Claus) wrote: >Hi, say I've got two sets of number, x and y, which I want to rank. >See the example below. I totally expect and want the result of >Ordering[x]. But I neiter understand nor expect the result of >Ordering[y]. Both Sort[x] and Sort[y] are ok. Can anybody explain to >me Ordering[y]? Thanks, Claus >In[3]:= x = {1, 2, 3, 6, 10, 3, 4} y = {1, 2, 7, 8, 9, 1, 2} >In[7]:= Ordering[x] Ordering[y] >Out[7]= {1, 2, 3, 6, 7, 4, 5} >Out[8]= {1, 6, 2, 7, 3, 4, 5} I don't understand your confusion. Looking at y I see the smallest value in position 1 with the same value in position 6. Hence the first two elements of the output. Then the next smallest values are in position 2 and 7. So, the first 4 items should be {1,6,2,7}. The largest 3 values occur in order from positions 3 to 5. So, the output should be {1,6,2,7,3,4,5} as is the case. What were you expecting? -- To reply via email subtract one hundred and four