test1.cpp

使用VC与MATLAB混合编程实现了一路波形信号的FFT变换

  
  
  dMm(fs); dMm(t); dMm(f1); dMm(f2); dMm(x); dMm(number); dMm(y); dMm(n); dMm(f); 
  
  call_stack_begin;
  display(clear());
  //编写骆遥 
  fs = 1000.0; display(fs);
  t = colon(0.0,1.0/fs,0.6);
  
  f1 = 100.0;
  
  f2 = 300.0;
  
  x = sin(2.0*pi*f1*t)+sin(2.0*pi*f2*t);
  
  display( subplot(711.0) );
  plot((CL(x)));
  
  display( title((CL(TM("f1（100Hz）\\f2(300Hz)的正弦信号，初相0")))) );
  display( xlabel((CL(TM("序列（n）")))) );
  grid(TM("on"));
  
  number = 512.0; display(number);
  
  y = fft(x,number);
  
  n = colon(0.0,1.0,length(y)-1.0);
  
  f = fs*n/length(y);
  
  display( subplot(713.0) );
  plot((CL(f),abs(y)));
  
  display( title((CL(TM("f1\\f2的正弦信号的FFT（512点）")))) );
  display( xlabel((CL(TM("频率Hz")))) );
  grid(TM("on"));
  call_stack_end;