How to write a pattern for any different values
显示 更早的评论
Hello,
Sorry if my title does not make much sense. Basically, I want to use the strfind command on the variable X. I've attached it in an excel file. I want to simply find the places that the variables changes from one number to another, but I'm not exactly sure how to write this pattern. How should I do this?
采纳的回答
Steve Eddins
2020-10-14
T = readtable('matlab_question2.csv');
idx = find(diff(T.x))
idx =
119
314
351
381
...
The first line reads your CSV file into a table that contains the variable x.
The function diff computes the differences between adjacent elements of its input.
The function find then returns the indices where the adjacent element differences are nonzero. These are the locations where the values change. For example:
>> idx(1)
ans =
119
>> T.x(117:121)
ans =
56.3279
56.3279
56.3279
0
0
4 个评论
Adam Danz
2020-10-14
My very-similar approach,
M = readmatrix('matlab_question2.csv');
change = [false; diff(M)~=0];
where 'change' is a logical vector identifying the rows where the value has changed.
Noah Kilps
2020-10-14
Image Analyst
2020-10-14
Can you please "Accept this answer"?
Steve Eddins
2020-10-14
Adam, I keep forgetting that readmatrix has already shipped, lol.
更多回答（0 个）
类别
在 帮助中心 和 File Exchange 中查找有关 Logical 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
