How to create a permutation table on Matlab?
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Hello every one. My name is Hang.
I'm working on a graduation project, I have a little bit of hope for people to help me.
I want to create a table containing all permutations of a string of n elements, a table to index each permutation of that string. everyone help me. Thanks everyone!
3 commentaires
Steven Lord
le 14 Mai 2019
How large a value of n are you planning to use? As the documentation states, the perms function is practical only for small vectors as the resulting matrix is of size [factorial(n), n] and that grows pretty quickly. Your matrix will have over three million rows for n = 10 and over six billion for n = 13.
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KSSV
le 14 Mai 2019
Modifié(e) : KSSV
le 15 Mai 2019
Read about perms.
str = 'MATLAB' ;
id = 1:length(str) ; % indices
ids = perms(id) ; % permuted indices
iwant = str(ids) ; % permuted string
pos = (1:length(iwant))' ;
T = table(pos,iwant) ; % convers to table
writetable(T,'test.xlsx') % write table to file
8 commentaires
Guillaume
le 14 Mai 2019
"I want ..."
Yes, so what's preventing you from doing that very trivial modification to KSSV's code? If you don't know how to construct a table, perhaps you should learn this from the documentation. If you don't know how to construct a vector of integers, perhaps you should learn to use matlab first.
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