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Re: Combining Two Lists
*To*: mathgroup at smc.vnet.net
*Subject*: [mg127028] Re: Combining Two Lists
*From*: christopher arthur <chris.arthur1 at gmail.com>
*Date*: Mon, 25 Jun 2012 04:02:02 -0400 (EDT)
*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com
*References*: <201206240827.EAA08453@smc.vnet.net>
*Reply-to*: chris.arthur1 at gmail.com
look at DataManipulation
Hershel Lackey a écrit :
> Hi,
>
> I'm having a little difficulty in combining two lists. These lists
> contain individual sets of data and then particular items within the
> set. On one list the first column is the set the data is in and the
> second column is the particular item, and this is followed by 5
> properties of that item. The second list starts the same, where the
> first column is the set the data is in and the second column is the
> item, but instead of having the properties listed out in individual
> columns the data set repeats itself listing the properties A,B,C,D,E,F
> all in the same column. Below is a representative example of the two
> list.
>
> List 1
> Data Set Item # Property 1 Property 2 Property 3 Property 4 Property 5
> Q1 1 6.78 25.61 30.90 48.90 0.61
> Q1 2 12.57 23.44 5.22 37.20 6.90
> Q2 8 18.78 21.17 11.37 2.54 0.82
> Q2 2 34.81 14.87 15.04 36.78 4.54
> Q2 10 22.75 10.34 16.61 23.49 3.86
> Q3 5 47.15 7.23 11.23 40.01 3.53
> Q3 8 28.71 12.41 18.40 49.17 5.99
>
> List 2
>
> Data Set Item# Property 6 Measure %
> Q1 1 A 0
> Q1 1 B 5
> Q1 1 C 15
> Q1 1 D 80
> Q1 1 E 0
> Q1 1 F 0
> Q1 2 A 80
> Q1 2 B 10
> Q1 2 C 10
> Q1 2 D 0
> Q1 2 E 0
> Q1 2 F 0
> Q2 2 A 5
> Q2 2 B 5
> Q2 2 C 0
> Q2 2 D 15
> Q2 2 E 0
> Q2 2 F 0
> Q2 8 A 0
> Q2 8 B 0
> Q2 8 C 65
> Q2 8 D 15
> Q2 8 E 0
> Q2 8 F 20
> Q2 10 A 5
> Q2 10 B 5
> Q2 10 C 85
> Q2 10 D 0
> Q2 10 E 0
> Q2 10 F 0
> Q3 5 A 8
> Q3 5 B 0
> Q3 5 C 85
> Q3 5 D 7
> Q3 5 E 0
> Q3 5 F 0
> Q3 8 A 12
> Q3 8 B 3
> Q3 8 C 60
> Q3 8 D 15
> Q3 8 E 0
> Q3 8 F 0
>
> Note that the item # are repeat between different data sets, and data
> sets are different sizes.
>
> What I would like to do is combine the two lists matching the first
> two columns, to give groups like {Q1, 1, 6.7, 25.61, 30.90, 48.90,
> 0.61,{0,5,15,80,0,0}} for each individual. I have used Cases to
> identify matching data sets and item numbers in the two lists. It is
> then possible to append the two portions of the list to give part of
> the desired data set. However, this was laborious in typing in every
> data set and then item # into Cases, and impractical for large data
> sets. I'm sure there is a way to Map Cases or Select over the list,
> and append the appropriate data when data set and item # match, but I
> haven't figured out how to do that. Also it seems possible to use an
> if then statement; that if the data set and item # match then append,
> else move through the list. However, I haven't figured out how to
> code for this either. I appreciate any help.
>
> Thanks,
>
> Hershel
>
>
>
L
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