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Results tagged with programming
Search options not deleted user 814
Questions on writing non-trivial programs in Mathematica. Do not use this tag for questions on plotting/graphics or for questions on doing mathematics with Mathematica, where the focus is more on the math than the program.
11 votes
Reading from STDIN, or: how to pipe data into Mathematica
Standard input Try using the Input and or InputString commands to read from the standard input. For example a program that does Print[InputString[]]; when run on the commandline with $> echo "H …
- 2,303
24 votes
7 answers
2k views
How do I generate the upper triangular indices from a list?
I have some list {1,2,3} How do I generate nested pairs such that I get {{1,2},{1,3},{2,3}} That is, I'd like a way to generate upper triangular indices. Bonus: a way to deal with the related p …
- 2,303
125 votes
3 answers
10k views
What is a Mathematica packed array?
A simple sounding question with a few sub questions: What is the difference between unpacked vs packed array? Are packed arrays more space efficent, how much so? Are packed arrays more time efficie …
- 2,303