SciPy 0.6.0 API Documentation Generated by Endo, 2007-10-17

Function summary

• chirp(t, f0 = 0, t1 = 1, f1 = 100, method = 'linear', phi = 0, qshape = None)
• gausspulse(t, fc = 1000, bw = 0.5, bwr = -Const(6), tpr = -Const(60), retquad = 0, retenv = 0)
• sawtooth(t, width = 1)
• square(t, duty = 0.5)

Functions

• chirp(t, f0 = 0, t1 = 1, f1 = 100, method = 'linear', phi = 0, qshape = None)

  Frequency-swept cosine generator.
  
  Inputs:
  
      t          --  array to evaluate waveform at
      f0, f1, t1 --  frequency (in Hz) of waveform is f0 at t=0 and f1 at t=t1
          Alternatively, if f0 is an array, then it forms the coefficients of
          a polynomial (c.f. numpy.polval()) in t. The values in f1, t1,
          method, and qshape are ignored.
      method     --  linear, quadratic, or logarithmic frequency sweep
      phi        --  optional phase in degrees
      qshape     --  shape parameter for quadratic curve: concave or convex
  

• gausspulse(t, fc = 1000, bw = 0.5, bwr = -Const(6), tpr = -Const(60), retquad = 0, retenv = 0)

  Return a gaussian modulated sinusoid:  exp(-a t^2) exp(1j*2*pi*fc)
  
  If retquad is non-zero, then return the real and imaginary parts
     (inphase and quadrature)
  If retenv is non-zero, then return the envelope (unmodulated signal).
  Otherwise, return the real part of the modulated sinusoid.
  
  Inputs:
  
     t   --  Input array.
     fc  --  Center frequency (Hz).
     bw  --  Fractional bandwidth in frequency domain of pulse (Hz).
     bwr --  Reference level at which fractional bandwidth is calculated (dB).
     tpr --  If t is 'cutoff', then the function returns the cutoff time for when the
                pulse amplitude falls below tpr (in dB).
     retquad -- Return the quadrature (imaginary) as well as the real part of the signal
     retenv  -- Return the envelope of th signal.
  

• sawtooth(t, width = 1)

  Returns a periodic sawtooth waveform with period 2*pi which rises from -1 to 1 on the interval 0 to width*2*pi and drops from 1 to -1 on the interval width*2*pi to 2*pi width must be in the interval [0,1]

• square(t, duty = 0.5)

  Returns a periodic square-wave waveform with period 2*pi which is +1 from 0 to 2*pi*duty and -1 from 2*pi*duty to 2*pi duty must be in the interval [0,1]

Imported Names