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How to observe this portion of the graph

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Tarek Hajj Shehadi
Tarek Hajj Shehadi 2021-4-30
回答： DGM 2021-5-1
When I plot the fourier transform of I obtained the following graph:
As you can note, on the horizontal part of the signal, the value of the output is essentially negligible for the eye but is actually non-zero now I was wondering if its possible to zoom in on the graph or scale it in a way to see this non-zero output. But I am unaware of any method. I hope someone can assist me.

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DGM
DGM 2021-5-1
There are view control tools in the figure toolbar/menu.
In newer versions, there's also contextual axes toolbars.
You could also try setting ylim([0 1E-5]) or something to change the view extents.

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