Index a series of integers in a column of matrix

1 次查看（过去 30 天）
Cheyenne Contreras
Cheyenne Contreras 2019-8-20
评论： Star Strider 2019-9-9
I am trying to find a function that will produce what row a series of numbers are together. For example in a column of the following:
T2 = [2 7 4 5 1 0 1 3 1 5 6 7 4 7 2 7]'
I would like to find which row there is a specific transition between 2 and 7 and vice versa. I have used the find(T2 == 2 & 7) function, however, that produces the location of every single location where the integer is exactly equal to 2 and 7.
Any suggestions?? Thank you!

请先登录，再回答此问题。

采纳的回答

Star Strider
Star Strider 2019-8-20
I am not sure what you want.
Try this:
T2 = [2 7 4 5 1 0 1 3 1 5 6 7 4 7 2 7]';
Idx = strfind(T2', [2 7])
Out = T2([Idx(:) Idx(:)+1])
producing:
Idx =
1 15
Out =
2 7
2 7
  4 个评论
显示 2更早的评论
Cheyenne Contreras
Cheyenne Contreras 2019-9-9
# Node
185 7
185 2
185 0
185 2
185 7
Hello,
Extending on this line of code, I need to determine the location of of 2 OR 7 when they are next to each other in the string. In the previous code, it was finding the occurance of the first location when 2 was before 7 and vice versa. Does anyone know if there is code to determine the second location regardless of order?
Thank you!
Star Strider
Star Strider 2019-9-9
A slight change in the earlier code:
T2 = [2 7 4 5 1 0 1 3 1 5 6 7 4 7 2 7]';
Idx1 = strfind(T2', [2 7]);
Idx2 = strfind(T2', [7 2]);
Idx = [Idx1(:); Idx2(:)]
Out = T2([Idx(:) Idx(:)+1])
produces:
Idx =
1
15
14
Out =
2 7
2 7
7 2
Note that you can use ‘Idx1’ and ‘Idx2’ separately, if you want specifically to index ‘[2 7]’ and ‘[7 2]’. I combined them here for convenience.

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 Time Series Events 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