How to find the settling time

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Mekala balaji 2017-12-6

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https://ww2.mathworks.cn/matlabcentral/answers/371433-how-to-find-the-settling-time

评论： Birdman 2017-12-11

Hi,

Below is my time series data, and I want to find the settling time of each variable, column1 is time, column2~4 are my variables.

Criterion is: if standard deviation >=0.05 then it is called a change, want to catch where the data change is >=0.05(Stdev) and keep stable, then it is called settling time.

For example: v2 change twice and settled at two time (5sec & 15sec), where as v1 only settled at 7sec.

My definition of change: change from 0 to a constant value. v1 changed from 0 to 1 at 7sec, and keep very stable near 1.

Time  v1  v2  v3
0  0  0
0  0  0
0  0  0
0  0  0
0  1  1
0  1  1
1  1  1
0.989  1  1
0.979  1  1
0.988  1  1
0.999  0  0
1  0  0
1  0  0
1  0  0
1  1  0
1  1  0
1  1  0
1  1  0
1  1  1
1  1  1
1  1  1
1  1  1
1  1  1
1  1  1
1  1  1
1  1  1
1  1  1
1  1  1
1  1  1

I open to welcome if any other method to catch the settling time(s). Some variables change twice or thrice.

My desired output:

v1  7  
v2  5  15
v3  5  19

回答（1 个）

Birdman 2017-12-6

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/371433-how-to-find-the-settling-time#answer_294982

SetTimeV1=find(diff(v1)>0.05)+1
SetTimeV2=find(diff(v2)>0.05)+1
SetTimeV3=find(diff(v3)>0.05)+1

Its fine, one more thing I just seek your help, how do I know the order of variables settling time(meaning: The order of variables setting). Suppose variable3 (v3) settle first and variable1(v1) settled and then the last variable to settling is variable2 (v2).