Azzera filtri
Azzera filtri

Generate a large power set in batches?

3 visualizzazioni (ultimi 30 giorni)
Peta
Peta il 17 Feb 2016
Commentato: Peta il 18 Feb 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?

Risposta accettata

Walter Roberson
Walter Roberson il 18 Feb 2016
Modificato: Walter Roberson il 18 Feb 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

Più risposte (0)

Categorie

Scopri di più su Get Started with MATLAB in Help Center e File Exchange

Prodotti

Community Treasure Hunt

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

Start Hunting!

Translated by