How to convert matrix to 1-D array and back to matrix form?
8 visualizaciones (últimos 30 días)
Mostrar comentarios más antiguos
j john
el 27 de Jul. de 2015
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.
0 comentarios
Respuesta aceptada
Stephen23
el 27 de Jul. de 2015
Editada: Stephen23
el 27 de Jul. de 2015
>> 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 comentarios
Stephen23
el 27 de Jul. de 2015
Editada: Stephen23
el 27 de Jul. de 2015
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?
Más respuestas (0)
Ver también
Categorías
Más información sobre Matrix Indexing en Help Center y File Exchange.
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!