How to find a slope of signal if we do not know the value of x1, x2, y1, y2

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Matlaber 2019-2-13

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评论： Star Strider 2019-2-18

采纳的回答： Star Strider

在 MATLAB Online 中打开

How can we find the slope of a signal if we do not know the value of x1, x2, y1, y2

which we cannot use

Slope = (y2 - y1) / (x2 - x1);

Example:

load sunspot.dat
year = sunspot(:,1);
avSpots = sunspot(:,2);
[pks,loc]=findpeaks(avSpots,year, 'Annotate','extents','WidthReference','halfheight')
axis([1700 1711 0 100])

give a graph of

Thank you

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Star Strider 2019-2-13

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/444854-how-to-find-a-slope-of-signal-if-we-do-not-know-the-value-of-x1-x2-y1-y2#answer_360923

I am not certain what you intend by ‘slope of a signal’. You can easily determine the derivatives of the signal with the gradient (link) function.

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Matlaber 2019-2-18

Thanks a lot!

Star Strider 2019-2-18

As always, my pleasure!

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