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Re: Simple list question

  • To: mathgroup at smc.vnet.net
  • Subject: [mg132594] Re: Simple list question
  • From: Alexei Boulbitch <Alexei.Boulbitch at iee.lu>
  • Date: Wed, 16 Apr 2014 03:39:26 -0400 (EDT)
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pcin = 2;
pcex = 3;   (*pcin and pcex can have various small values *)

coin = Table[{10 RandomReal[], 10 RandomReal[]}, {pcin}]
coex = Table[{3 RandomReal[], 3 RandomReal[]}, {pcex}]
cobo = Append[coin, coex]


gives, typically,

{{0.288346, 3.57763}, {1.7335, 8.69666}}
{{0.179831, 1.35324}, {0.927483, 0.931586}, {1.76338, 2.45073}}
{{0.288346, 3.57763}, {1.7335,
   8.69666}, {{0.179831, 1.35324}, {0.927483, 0.931586}, {1.76338,
    2.45073}}}

What I want is a series of x,y coordinates with no extra nesting:

{{0.288346, 3.57763}, {1.7335,
   8.69666}, {0.179831, 1.35324}, {0.927483, 0.931586}, {1.76338,
    2.45073}}

I'm embarrassed to admit that I can't find how to do this.

Please email me. Thank you.


Hi, you need Join instead of Append:

pcin = 2;
pcex = 3;(*pcin and pcex can have various small values*)coin =
 Table[{10 RandomReal[], 10 RandomReal[]}, {pcin}];
coex = Table[{3 RandomReal[], 3 RandomReal[]}, {pcex}];
cobo = Join[coin, coex]


{{5.32716, 5.67691}, {0.325954, 1.69115}, {1.9243, 1.15678}, {1.23113,
   1.97135}, {0.844278, 2.93468}}

Have fun, Alexei

Alexei BOULBITCH, Dr., habil.
IEE S.A.
ZAE Weiergewan,
11, rue Edmond Reuter,
L-5326 Contern, LUXEMBOURG

Office phone :  +352-2454-2566
Office fax:       +352-2454-3566
mobile phone:  +49 151 52 40 66 44

e-mail: alexei.boulbitch at iee.lu





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