Borrar filtros
Borrar filtros

Generate a large power set in batches?

3 visualizaciones (últimos 30 días)
Peta
Peta el 17 de Feb. de 2016
Comentada: Peta el 18 de Feb. de 2016
Say I want to generate the power set of a number and store as logical combinations using this formula for example:
idx = dec2bin(0:2^n-1,n)=='1';
But the n value I want to use is big enough that the resulting idx variable becomes too large to store in memory or work with. Is there any way that I can generate the power set batch-wise in a loop so I only have to store parts of it at a time but in the end I will have worked my way though all of it?
So for example, is there any way I can generate the first 100 values of the set and then start regenerating at 101 and go to 200 etc?

Respuesta aceptada

Walter Roberson
Walter Roberson el 18 de Feb. de 2016
Editada: Walter Roberson el 18 de Feb. de 2016
n = 14; %for example
batch_size = 100;
maxidx = 2^n - 1;
for k = 0 : ceil(maxidx/batch_size)
high = min(maxidx, (k+1)*batch_size - 1);
idx = dec2bin(k * batch_size : high, n) == '1';
...
end

Más respuestas (0)

Categorías

Más información sobre Get Started with MATLAB en Help Center y File Exchange.

Productos

Community Treasure Hunt

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

Start Hunting!

Translated by