How do I add 1 position and 1 position only in a 2d array. I tried adding the array value like a 1d array but multiple element were added. Can anyone help me?
This is a 2d array:
Is it possible to do this:
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Unclear question, please revise.Casper Beyer– Casper Beyer2014-08-10 01:31:47 +00:00Commented Aug 10, 2014 at 1:31
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It seems that OP tries to resolve the same problem than in how-to-turn-list-into-a-square-list but with array.Jarod42– Jarod422014-08-10 01:47:21 +00:00Commented Aug 10, 2014 at 1:47
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1 Answer
It's not possible. Every language I know of requires matrices to be "rectangular." I would recommend either using a 2X2 matrix plus a variable, or a column or row vector of length five. You can also create a 3X2 or 2X3 matrix and just choose to leave one element as NaN or 0 etc. I may be able to answer your question better if you leave a comment telling me the reasoning behind wanting a non rectangular matrix.
EDIT: I was wrong you can create non rectangular matrices in Java link.
4 Comments
Natan Streppel
Java is one exception to your "rectangular matrices" statement. I believe that there are other languages that allow this kind of feature, too.
NetVipeC
It depend the data structure used for storage the matrix, for example
std::vector<std::vector<int>> would let you do the behavior asked if you want, i understand that would not be a matrix anymore, but let you do it.
user3854447
These folks are right! You can create non rectangular arrays in Java (also C#). Here is a link showing you how link. I will edit my post to reflect this change. Thank you @Streppel!
Natan Streppel
Now that I've read @NetVipeC's comment, I realized that my comment kind of twisted the concept of a matrix. If I could edit it back again, I'd written array of arrays, which is what they are actually called, and not a matrix.