清空筛选条件
清空筛选条件

How to create a permutation table on Matlab?

7 次查看（过去 30 天）
hang dong
hang dong 2019-5-14
评论： hang dong 2019-5-15
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 个评论
显示 1更早的评论
hang dong
hang dong 2019-5-14
What function do you use to list permutations of a string of n elements?
Steven Lord
Steven Lord 2019-5-14
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.

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

KSSV
KSSV 2019-5-14
编辑：KSSV 2019-5-15
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 个评论
显示 6更早的评论
Guillaume
Guillaume 2019-5-14
"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.

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 String Parsing 的更多信息

标签

Community Treasure Hunt

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

Start Hunting!

Translated by