?? fft_analysis.m
字號:
function[f,fft_data_plot,fft_iapp_plot]= fft_analysis(test_time,test_data,iapp)
fft_size=size(test_time,1);% get the column size in time domain
fft_data=20*log10(abs(fft(test_data,fft_size)));% get the amplitude in dB
fs=1/(test_time(2)-test_time(1));
f=fs*(0:fix(fft_size/2))/fft_size;
% To obtain the correct amplitude mulitply it by 2/N
factor=2/size(test_time,1);
fft_data_plot=fft_data(1:(fix(fft_size/2)+1)).*factor;
fft_iapp=20*log10(abs(fft(iapp,fft_size)));% get the amplitude in dB
fft_iapp_plot=fft_iapp(1:(fix(fft_size/2)+1)).*factor;
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -