How to convert matrix to 1-D array and back to matrix form?

8 次查看（过去 30 天）
j john
j john 2015-7-27
编辑： Stephen23 2015-7-27
I have a matrix of size say, W X H, i have to convert the matrix into a 1-D array and perform some operations(bitxor) and again retrieve back my image in the same dimension ie W X H. How to do it? Thanks in advance.

请先登录，再回答此问题。

采纳的回答

Stephen23
Stephen23 2015-7-27
编辑：Stephen23 2015-7-27
Use reshape to do both of these:
>> A = [1,2,3,4;5,6,7,8]
A =
1 2 3 4
5 6 7 8
>> B = reshape(A,1,[]) % columnwise
B =
1 5 2 6 3 7 4 8
>> B = reshape(A.',1,[]) % rowwise
B =
1 2 3 4 5 6 7 8
>> reshape(B,size(A))
ans =
1 3 5 7
2 4 6 8
Note how one can use the transpose operator to select between columnwise and rowwise conversion from the matrix to the vector.
  3 个评论
显示 1更早的评论
Stephen23
Stephen23 2015-7-27
编辑：Stephen23 2015-7-27
If the number of elements has changed then you will have to decide yourself how this should be dealt with. You have many choices, such as:
  • define a new size based on the new number of elements
  • removing some values
  • padding
  • subsampling
  • interpolating
  • extrapolating
  • etc
What do you want to do?
j john
j john 2015-7-27
okay... Thanks Stephen for helping me. I think i have to remove some elements to keep the number of elements same.

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Shifting and Sorting Matrices 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by