Data

1 次查看（过去 30 天）
Mate 2u
Mate 2u 2012-5-4
Hi there, I have a 6 million x 1 array of prices. I want to change it so that it is +1 if P+1 > P, -1 if P-1 <P and 0 if P+1=P
  2 个评论
Mate 2u
Mate 2u 2012-5-4
Additionally would prefer if algorithm is quick.
Daniel Shub
Daniel Shub 2012-5-4
What happens if P < P+1 and P > P-1?

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Andrei Bobrov
Andrei Bobrov 2012-5-4
sign(diff(P));
  3 个评论
显示 1更早的评论
Andrei Bobrov
Andrei Bobrov 2012-5-4
hence P(ii) == P(ii + 1)
Daniel Shub
Daniel Shub 2012-5-4
@Mate, the documentation for sign clearly states that sign(0) is 0.

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Language Fundamentals 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