Wolfram Mathematica

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2:43 PM

Groan. Made a "great" answer to a question, just to find out OP removed whole question in the meantime...

MatrixPlot[#, ColorFunction -> "Monochrome"] & /@
 With[{n = 3},
  Map[Min[{1, #}] &, # + Transpose[#], {2}] & /@
   Outer[PadRight[#, n] &@*Take, Tuples[{0, 1}, n (1 + n)/2],
    Table[{2 - i + i^2, i + i^2}/2, {i, n}], 1]]

Not really that elegant... :)

Guess who it is.

3:07 PM

@kirma, hate it when that happens, but people are free to change their minds after all… oh well.

kirma

@Guesswhoitis. Yep... well, I mostly study questions that are either obvious (and still unanswered), of personal interest, or clearly on the range where I can train myself on a problem that's relatively easy, but not entirely trivial (or hard). This was one I thought of being the sort I could reuse later myself.

4 hours later…

Meta

7:38 PM

Q: being on-hold is not intentional

Besides, so many thanks to meta users and other users for their helps and guidance. But I think, some decisions discourage new users. I think, if any user or new user knows where is his/her mistakes, he/she doesn't have to write their questions. Although, some questions seems to be too simple for...