copy a handle of an Array
4 ビュー (過去 30 日間)
古いコメントを表示
I want a method to copy a handle of an Array not the Array Elements. like the java Arrays. for Example: X = [3 3 3]; A = handle(X); so when I change A, X will Automatically changed. so: A(2) = 0; will case that x = 3 0 3
0 件のコメント
採用された回答
Daniel Shub
2011 年 11 月 17 日
You cannot do it. While MATLAB supports handle classes, you cannot subclass double to be a handle class. There are a number of different ways to work around the problem, can you provide more about what you want to do?
If you are simply trying to avoid memory issues, MATLAB handles that behind the scenes and often there isn't a memory advantage between passing arrays, handles or pointers.
2 件のコメント
Daniel Shub
2011 年 11 月 17 日
Try it yourself. Watch a memory manager when you execute
a.x = randn(1e8, 1);
followed by
x = a.x;
その他の回答 (1 件)
Walter Roberson
2011 年 11 月 17 日
Everything Daniel said is correct.
Perhaps for your purposes, you could make use of Matt J's file exchange contribution http://www.mathworks.com/matlabcentral/fileexchange/26611-on-the-fly-definition-of-custom-matrix-objects . and adapt it to your needs. You might end up needing to subclass it from the handle class to achieve your needs. I don't say that it will be easy, but if you really need it, you really need it.
Or perhaps the dataset array from the stats toolbox would meet your needs (we aren't clear yet as to what those needs are.)
参考
カテゴリ
Help Center および File Exchange で Logical についてさらに検索
製品
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!