How do convert array x to array z?

10 次查看（过去 30 天）
Hamidreza Rafat
Hamidreza Rafat 2018-8-28
编辑： Andrei Bobrov 2018-8-28
Hi, How do convert array x to array z ?
x = [4 4 8 8 8 5 5 4 8 8 4]
Z = [1 1 2 2 2 3 3 1 2 2 1]
4 -> 1
8 -> 2
5 -> 3

请先登录，再回答此问题。

采纳的回答

Stephen23
Stephen23 2018-8-28
编辑：Stephen23 2018-8-28
If you want to convert the first value, whatever it may be, to 1, the second to 2, etc:
>> x = [4 4 8 8 8 5 5 4 8 8 4];
>> [~,ia,ic] = unique(x,'first');
>> [~,ia] = sort(ia);
>> z = ia(ic)
z =
1 1 2 2 2 3 3 1 2 2 1

更多回答（1 个）

Andrei Bobrov
Andrei Bobrov 2018-8-28
编辑：Andrei Bobrov 2018-8-28
or just:
[~,~,z] = unique(x,'stable');
or more
[~,z] = ismember(x,[4 8 5]);

类别

在 Help Center 和 File Exchange 中查找有关 Logical 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