ADC测试的疑问求助

程序中计算谐波频率和能量的语句如下，能否帮忙解释下每句的意义，谢谢了
F_harmonic=[];
P_harmonic=[];
for har_number=1:10
tone=rem((har_number*(F_in-1)+1)/N,1);
if tone>0.5
tone=1-tone;
end
F_harmonic=[F_harmonic tone];
har_peak=max(spectp(round(tone*N)-spanh:round(tone*N)+spanh));
har_bin=find(spectp(round(tone*N)-spanh:round(tone*N)+spanh)==har_peak);
har_bin=har_bin+round(tone*N)-spanh-1;
P_harmonic=[P_harmonic sum(spectp(har_bin-1:har_bin+1))];
end

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