Re: List handling
- To: mathgroup at smc.vnet.net
- Subject: [mg15283] Re: List handling
- From: gaylord at ux1.cso.uiuc.edu (richard j. gaylord)
- Date: Thu, 31 Dec 1998 04:39:37 -0500
- Organization: university of illinois
- References: <76ciqj$o51@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
hi jorge:
this will do it.
In[93]:=
ListA=
{1977.06,1977.06,1977.06,1977.06,1977.06,2047.77,2047.77,2047.77,2047.77,
2181.55,2181.55,2181.55,2244.73,2244.73,2244.73,2305.5,2305.5,2305.5,2305.5,
2363.92,2363.92,2363.92,2363.92,2363.92,2363.92,2363.92,2363.92,2363.92,2363.92
,2363.92};
In[94]:=
ListB=
{0.684807,0.683029,0.665242,0.665242,0.664123,0.683029,0.665242,0.665242,
0.664123,0.640339,0.640339,0.620329,0.640339,0.640339,0.620329,0.661684,0.640339,0.640339,0.620329,0.640339,0.622044,0.640339,0.621506,0.660996,0.640339,0.641006,0.640339,0.620935,0.640339,0.640339};
In[95]:=
ListC=
{1971.45,1973.53,1994.29,1994.29,1995.6,2044.23,2065.,2065.,2066.3,2227.86,
2227.86,2251.22,2291.04,2291.04,2314.4,2326.89,2351.81,2351.81,2375.17,
2410.22,2431.58,2410.22,2432.21,2386.11,2410.22,2409.44,2410.22,2432.88,2410.22,
2410.22};
In[96]:=
ListA[[ Flatten[Position[ListB,_?(#>0.68&)]] ]] =
ListC[[ Flatten[Position[ListB,_?(#>0.68&)]] ]];
In[99]:=
ListA
Out[99]=
{1971.45,1973.53,1977.06,1977.06,1977.06,2044.23,2047.77,2047.77,2047.77,
2181.55,2181.55,2181.55,2244.73,2244.73,2244.73,2305.5,2305.5,2305.5,2305.5,
2363.92,2363.92,2363.92,2363.92,2363.92,2363.92,2363.92,2363.92,2363.92,
2363.92,2363.92}
you can also use the more compact form
(ListA[[#]] = ListC[[#]])&[Flatten[Position[ListB,_?(#>0.68&)]]];
-richard-
=========================
In article <76ciqj$o51 at smc.vnet.net>, "Jorge Zickermann"
<jzickermann at mail.EUnet.pt> wrote:
> listA=
>
> {1977.06,1977.06,1977.06,1977.06,1977.06,2047.77,2047.77,2047.77,2047.77,218
> 1.55,2181.55,2181.55,2244.73,2244.73,2244.73,2305.5,2305.5,2305.5,2305.5,236
> 3.92,2363.92,2363.92,2363.92,2363.92,2363.92,2363.92,2363.92,2363.92,2363.92
> ,2363.92}
>
> ListB=
>
> {0.684807,0.683029,0.665242,0.665242,0.664123,0.683029,0.665242,0.665242,0.6
> 64123,0.640339,0.640339,0.620329,0.640339,0.640339,0.620329,0.661684,0.64033
> 9,0.640339,0.620329,0.640339,0.622044,0.640339,0.621506,0.660996,0.640339,0.
> 641006,0.640339,0.620935,0.640339,0.640339}
>
> ListC=
>
> {1971.45,1973.53,1994.29,1994.29,1995.6,2044.23,2065.,2065.,2066.3,2227.86,2
> 227.86,2251.22,2291.04,2291.04,2314.4,2326.89,2351.81,2351.81,2375.17,2410.2
> 2,2431.58,2410.22,2432.21,2386.11,2410.22,2409.44,2410.22,2432.88,2410.22,24
> 10.22}
>
> Position[ListB,_?(#>0.68&)]
>
> {{1},{2},{6}}
>
> Having obtained the positions of certain selected elements from ListB, I
> want to substitute the corresponding elements in ListA by the
> corresponding elements in ListC. In other words, I want to end up with;
>
>
> listA=
>
> {1971.45,1973.53,1977.06,1977.06,1977.06,2044.23,2047.77,2047.77,2047.77,218
> 1.55,2181.55,2181.55,2244.73,2244.73,2244.73,2305.5,2305.5,2305.5,2305.5,236
> 3.92,2363.92,2363.92,2363.92,2363.92,2363.92,2363.92,2363.92,2363.92,2363.92
> ,2363.92}
>
> Any help on how to do this is welcome. Thank you.
>
> Jorge
--
"I would say life is pretty pointless, wouldn't you, without the movies?"
Vincent Gallo as Johnny Tempi in The Funeral (1996)