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Mathematica Wolfram Language

Is AppendTo a good approach to making a list of lists?

Posted 12 years ago

I have lists such as {{1, 1}, {8, 2}, {7, 4}, {1, 1}} then {{8, 2}, {15, 5}, {7, 4}, {8, 2}} then {{18, 4}, {15, 5}, {8, 2}, {18, 4}} I want to create {{{1, 1}, {8, 2}, {7, 4}, {1, 1}} , {{8, 2}, {15, 5}, {7, 4}, {8, 2}} , {{18, 4}, {15, 5}, {8, 2}, {18, 4}}} I have tried AppendTo first list , second list, then AppendTo result to third list, but get {{1, 1}, {8, 2}, {7, 4}, {1, 1}, {{8, 2}, {15, 5}, {7, 4}, {8, 2}}, {{18, 4}, {15, 5}, {8, 2}, {18, 4}}} which is the wrong nesting. Any ideas?

POSTED BY: richardb1935 Bauer

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Posted 12 years ago

You can just nest them in the top list: In[1]:= lst1 = {{1, 1}, {8, 2}, {7, 4}, {1, 1}}; lst2 = {{8, 2}, {15, 5}, {7, 4}, {8, 2}}; lst3 = {{18, 4}, {15, 5}, {8, 2}, {18, 4}}; {lst1, lst2, lst3} Out[4]= {{{1, 1}, {8, 2}, {7, 4}, {1, 1}}, {{8, 2}, {15, 5}, {7, 4}, {8, 2}}, {{18, 4}, {15, 5}, {8, 2}, {18, 4}}} Best, David

POSTED BY: David Keith

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