extracting number from a string

9 次查看（过去 30 天）
amin mirzaei
amin mirzaei 2019-8-2
评论： amin mirzaei 2019-8-2
How can I extract the number from the string with out regexp?
example: I am 19 and my brother is 14 years old
'19','12'
  2 个评论
Rik
Rik 2019-8-2
编辑：Rik 2019-8-2
Why don't you want to use regexp? Should the code support decimal values as well? Numbers in the form of 1E5? Also, is this homework?

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

Rik
Rik 2019-8-2
You can either use ismember to determine which positions contain the characters you're looking for, or you can use isstrprop. Then you can loop over the groups of digits. You can use find and diff to determine the positions where such a group starts. If you need to support decimal values as well things will get slightly more complicated.
I will not provide a complete working solution because this is homework. You can find guidelines for posting homework on this forum here.
You should also be aware that the string data type is something different from a char array.

类别

在 Help Center 和 File Exchange 中查找有关 Characters and Strings 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