How to add zeros to the end of an array
469 visualizaciones (últimos 30 días)
Mostrar comentarios más antiguos
Vishnu M S
el 29 de En. de 2013
Respondida: Steven Lord
el 29 de Nov. de 2023
I have two arrays like A=[ 1 5 3 8 9 4 7 6 5 2 ] & B=[ 5 2 3 9 7 4 5 ]
In 'A', I have 10 elements(say m) and in 'B', I have 7(say n) elements. I need to add 10-7=3 (m-n) zeros to the end of B.
Please help.
2 comentarios
Becky CNS
el 15 de Mzo. de 2018
Movida: Dyuman Joshi
el 29 de Nov. de 2023
I am trying to do this but with A and B as matrices. The error message I get is 'Dimensions of matrices being concatenated are not consistent'. All I want to do is add zeros to another vector the length of A-B. How would I change the above code?
Jan
el 15 de Mzo. de 2018
Movida: Dyuman Joshi
el 29 de Nov. de 2023
If you post your code, we could fix it directly. This would be more convenient and useful than to create an artificial example.
A = rand(3,4);
B = rand(2,2);
B(size(A,1), size(A,2)) = 0;
A - B
Respuesta aceptada
Jan
el 29 de En. de 2013
Editada: Jan
el 29 de En. de 2013
Matlab fills missing elements with 0 automatically:
A = [1 5 3 8 9 4 7 6 5 2];
B = [5 2 3 9 7 4 5];
B(numel(A)) = 0;
Less efficient, but working also:
B = [B, zeros(1, length(A) - length(B))];
12 comentarios
Jan
el 26 de En. de 2021
@Black4Ghost: Filling with characters works by:
[YourData, rempmat('0', 1, wantedWidth - numel(YourData))]
Más respuestas (3)
Azzi Abdelmalek
el 29 de En. de 2013
Editada: Azzi Abdelmalek
el 29 de En. de 2013
A=[ 1 5 3 8 9 4 7 6 5 2 ];
B=[ 5 2 3 9 7 4 5 ];
B(end:numel(A))=0
2 comentarios
Steven Lord
el 29 de Nov. de 2023
A=[ 1 5 3 8 9 4 7 6 5 2 ];
B=[ 5 2 3 9 7 4 5 ];
n = max(length(A), length(B)); % using length is okay since A and B are both vectors
If we always want to make the vector longer or keep it the same size, use paddata.
A2 = paddata(A, n)
B2 = paddata(B, n)
If you want to append to the vector or remove elements depending on whether it's shorter or longer than your desired size, use resize.
A3 = resize(A, 8) % drop last 2 elements
B3 = resize(B, 8) % add one 0 at the end
There's also trimdata to always make it the desired length or shorter.
0 comentarios
Ver también
Categorías
Más información sobre Matrices and Arrays 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!