How to use hanning window to get 5 cyles of sine waves?

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Ramesh Bala 2019-8-12

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https://ww2.mathworks.cn/matlabcentral/answers/475788-how-to-use-hanning-window-to-get-5-cyles-of-sine-waves

评论： mm99 2019-12-28

采纳的回答： Andrey Kiselnikov

x.mat

在 MATLAB Online 中打开

load ( 'x.mat' )
t = 0: 10 * pi; % 5 cyeles
sf = 200e3; % frequency
sinewave = sin (2 * pi * sf * x); % gen continuous sine waves
w = hanning (length (sinewave)); % hann
figure (1);
plot (w);
% I do not know where to include the 5 cycles here

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采纳的回答

Andrey Kiselnikov 2019-8-12

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https://ww2.mathworks.cn/matlabcentral/answers/475788-how-to-use-hanning-window-to-get-5-cyles-of-sine-waves#answer_387209

编辑：Andrey Kiselnikov 2019-8-12

在 MATLAB Online 中打开

First of all you should properly define your data: "t = 0: 10 * pi; % 5 cyeles" I assume that you would like to define something like this "t = 0:1/sf:10*pi", more over "t" never used. Can you describe your task more properly?

>> t = 0: 10 * pi
t =
  Columns 1 through 17
     0     1     2     3     4     5     6     7     8     9    10    11    12    13    14    15    16
  Columns 18 through 32
    17    18    19    20    21    22    23    24    25    26    27    28    29    30    31