How to cut the signal

Dear All, I have waveform data in csv file in 'X' and 'Y' axis, the plot is on the figure attached. I want to remove the unneeded signal marked by arrows sign in order to get complete waveform signal. Is there any advice/better algorithm to remove the signal automatically ? My idea is to track the data in a loop then find the '0' value in the 'Y' axis and delete the rows before. Best regards.

[Supratim]

You can go to the Panner under display tab in signal analyzer app, and then you can crop out your signal

Answer 1

[Image Analyst]

How about if you simply find the first and last time that y is negative?

index1 = find(y < 0, 1, 'first'); % Find left index
index2 = find(y < 0, 1, 'last');  % Find right index.
% Now crop signal
yCropped = y(index1:index2);

[djoerig Hartono]

Great, best regards

[Lokesh Chowdary Patibandla]

What is the 1 value in the index 1 & 2.

[Image Analyst]

I don't know what that means. Please reword the question.

1 is just a number I put in the variable name index1 to distinguish it from a different variable called index2. You could use other names if you want.

The 1 that is the second argument to the find function means to return 1 value where y is negative, not multiple indexes where it's negative.

Answer 2

[Supratim]

You can go to the Panner under display tab in signal analyzer app, and then you can crop out your signal

Answer 3

[Supratim]

You can go to the Panner under display tab in signal analyzer app, and then you can crop out your signal

Answer 4

[Supratim]

You can go to the Panner under display tab in signal analyzer app, and then you can crop out your signal

Answer 5

[Supratim]

You can go to the Panner under display tab in signal analyzer app, and then you can crop out your signal

Answer 6

[Supratim]

You can go to the Panner under display tab in signal analyzer app, and then you can crop out your signal