?? at.m
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function I = at(x,f)% AT Return element index corresponding to a frequency value.%% I = AT(X,F) Return element index I at frequency location F in frequency% object X.% $Id: at.m 3 2004-02-04 12:57:04Z mairas $if length(x.vec)>0 I = at(x.vec,f);else I = zeros(size(f)); for i=1:length(f) I(i) = mod(round(x.num/x.fs*f(i)),x.num)+1; endend?? 快捷鍵說明
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