How to create a permutation table on Matlab?

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!

[madhan ravi]

What have you tried?

[hang dong]

What function do you use to list permutations of a string of n elements?

[Steven Lord]

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.

Answer 1

[KSSV]

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

[hang dong]

sorry. I want to record the permutation result into a file, index each permutation, then use this result to perform another math formula

[hang dong]

The index of permutations is in the range of 0 -> n - 1

[KSSV]

Edited the code...now it will give indices also.

[hang dong]

thank for supporting me!

[KSSV]

Thank you is accepting the answer. :)

[hang dong]

I want the results shown as follows:

indices permuted

0 MATLAB

1 MTALAB

...

719 BALATM

[Guillaume]

"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.

[hang dong]

KSSV. thank for supporting me!