How to apply window function in MATLAB

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Yian Chen 2021-11-24

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https://ww2.mathworks.cn/matlabcentral/answers/1595194-how-to-apply-window-function-in-matlab

评论： dpb 2021-11-28

I wanna to apply a window function to my FT result. I have two questions, the first one is how to add the window function code, like w = window(blackman,L)? But it doesn't work. Another one is how to determine which window to choose? Here is my plots.

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Yian Chen 2021-11-28

Thanks,

My data is about temperature that shown on the plot. I wanna see the cycle of the temperature, but the temperature is osillated and the FT of it is like the plot above. How can I choose the window?

dpb 2021-11-28

That doesn't indicate there is any real repetitive patter in the signal -- how did you get the above? As asked before, Show us the actual code used, we can't really tell anything at all from just the plot.

Most temperatures are slow-responding to external stimuli so you may not have collected nearly enough data to uncover any pattern.

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