row deletion not working, can you help?

%I have the following fft calc;
      freqMin = 10;
      freqCap = 50;
      te = (time>=5.0);
      fs = (length(time(te))-1)/(max(time(te))-min(time(te))); % fs = 1000
      NFFTt = length(Ty(te));
      Yt = fft(Ty(te),NFFTt);
      freqt = ((0:1/NFFTt:1-1/NFFTt)*fs).'; % freqt = 0, 1.9960, 3.9920, ..., 998.004
      ampt = abs(Yt);
      fftArrayt = [freqt,ampt]
      idxFreqCapt = find(freqt > freqCap & freqt < freqMin) % returns this ->  0×1 empty double column vector
      fftArrayt(idxFreqCapt,:) = [] % returns this ->

%     fftArrayt =
%
%   1.0e+03 *
%
%         0    0.8824
%    0.0020    0.9291
%    0.0040    0.7940
%    0.0060    0.4000
%    ...
%    
% Is it because it's looking at the rows and not seeing the *1000 so ignoring the delete rule?
% Can you help me delete freqt below 10 and above 50?

Answer 1

[david ocallaghan]

% As I wanted to keep 10 < fftArrayt < 50, I replaced the logic with...
      idxFreqCapt = find(freqt > freqCap);
      idxFreqMint = find(freqt < freqMin);
      idxFreqt = [idxFreqMint;idxFreqCapt]
      fftArrayt(idxFreqt,:) = [];