Printing positive numbers backwards
2 visualizaciones (últimos 30 días)
Mostrar comentarios más antiguos
Hi all,
I was just wondering if anyone could help me out with some code to go through a matrix of numbers and find the positive numbers and print only them (remove the negative numbers) in a new array but also print them in reverse order,
Thanks a lot!
1 comentario
Respuestas (1)
Rajani Mishra
el 16 de Jul. de 2019
Hi,
I understand that you want to extract positive numbers from matrix and store them in a new array and then traverse the new array in reverse order.
Refer this code:
[row,col] = size(mt)
arr = [];
for i = 1:row
for j = 1:col
if mt(i,j) > 0
arr(numel(arr) + 1) = mt(i,j);
end
end
end
for i = numel(arr):-1:1
disp(arr(i));
end
1 comentario
Stephen23
el 16 de Jul. de 2019
Editada: Stephen23
el 16 de Jul. de 2019
Is there are reason why this answer does not use MATLAB's basic (and most useful) features, e.g. logical indexing, code vectorization, etc.?
Note that the output array should be preallocated:
It is much simpler to just use efficient logical indexing (this gives the same output):
B = mt.';
flipud(B(B>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!