Re: pick out an element from list

• To: mathgroup at smc.vnet.net
• Subject: [mg98075] Re: [mg98011] pick out an element from list
• From: DrMajorBob <btreat1 at austin.rr.com>
• Date: Sun, 29 Mar 2009 02:47:27 -0500 (EST)
• References: <200903281040.FAA04302@smc.vnet.net>

```Like this?

test = RandomInteger[{0, 10}, 10]

{5, 9, 9, 2, 0, 4, 10, 4, 5, 4}

NestList[Rest[# - #[[1]]] &, test, 9]

{{5, 9, 9, 2, 0, 4, 10, 4, 5, 4}, {4, 4, -3, -5, -1, 5, -1,
0, -1}, {0, -7, -9, -5, 1, -5, -4, -5}, {-7, -9, -5,
1, -5, -4, -5}, {-2, 2, 8, 2, 3, 2}, {4, 10, 4, 5, 4}, {6, 0, 1,
0}, {-6, -5, -6}, {1, 0}, {-1}}

Bobby

wrote:

> i have a list with n element.i want to pick out an element from the
> list, and to deduct the element from all the other residual elements.
> This process is the first step. i must apply all elements of the list,
> invariably. Namely, in conclusion, i will obtain n list with n-1
> elements. now, i will try to explain as numerically. let element number
> of the list be 2500. and i am picking out the first element of the list.
> and i'm deducting the first element from the residual elements of the
> list. and now, i have a list with 2499 elements.after that, i'm passing
> the second element, and i'm applying the same processes. Ä± can't do
> this, can anyone help me???
>

--
DrMajorBob at bigfoot.com

```

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