Re: How to combine 2 list

• To: mathgroup at smc.vnet.net
• Subject: [mg122489] Re: How to combine 2 list
• From: Pete Boardman <pete.boardman at mac.com>
• Date: Sun, 30 Oct 2011 04:20:37 -0500 (EST)
• Delivered-to: l-mathgroup@mail-archive0.wolfram.com
• References: <201110291113.HAA05419@smc.vnet.net>

```> I have tried to find the answer on this, I am sure it has been asked before. Can anyone help?
>
> I have 2 list:
>
> cumlativeNetProfitLoss = Drop[FoldList[Plus, 0, listNetProfitLoss], 1]
>
> {1.11, 2.07, 2.75, 3.49, 3.79, 10.2, 11.03, 19.84, 22.07, 23.29}
>
> and
>
> dateList = Reverse[dateNetProfitLoss[[All, 1]]]
> {{2011, 8, 31}, {2011, 9, 2}, {2011, 9, 6}, {2011, 9, 20}, {2011, 9, 21}, {2011, 9, 22}, {2011, 9, 28}, {2011, 9, 30}, {2011, 10, 4}, {2011, 10, 10}}
>
>
>
>
>
> How to I get:
>
> {{{2011, 8, 31}, 1.11}, {{2011, 9, 2}, 2.07}, {{2011, 9, 6}, 2.75}, {{2011, 9, 20}, 3.49}, {{2011, 9, 21}, 3.79}, {{2011, 9, 22}, 10.2}, {{2011, 9, 28}, 11.03}, {{2011, 9, 30}, 19.84}, {{2011, 10, 4}, 22.07}, {{2011, 10, 10}, 23.29}}
>
>

In[355]:= Partition[Riffle[dateList, cumlativeNetProfitLoss], 2]

Out[355]= {{{2011, 8, 31}, 1.11}, {{2011, 9, 2}, 2.07}, {{2011, 9, 6},
2.75}, {{2011, 9, 20}, 3.49}, {{2011, 9, 21},
3.79}, {{2011, 9, 22}, 10.2}, {{2011, 9, 28},
11.03}, {{2011, 9, 30}, 19.84}, {{2011, 10, 4},
22.07}, {{2011, 10, 10}, 23.29}}

The Core Language manual has a good analysis of list functions grouped by application.

```

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