the findpeaks function does not seem to work for me

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Daniel Abraham
Daniel Abraham 2021-7-21
评论： Star Strider 2021-7-22
Hello Everyone, I am currently having issues with the findpeaks function. I am trying to do a peak analysis to visualise the peak values of a particular dataset in my table. The table is named T and the datetime column is T.Date while the main data is T.Data.
This is what I wrote:
plot(T.Date,T.Data,'r-')
grid on
findpeaks(T.Data)
but it displays this error: Undefined function 'findpeaks' for input arguments of type 'double'.
Does anyone know what it means please?
Thanks in advance for your response.

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Star Strider
Star Strider 2021-7-21
The findpeaks function is in the Signal Processing Toolbox. You will have to have it licensed and installed to use the functions.
If you have R2017b or later, you can use the islocalmax function. It is similar, although not identical to findpeaks.
.

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