#### Previous topic

scipy.special.erfcx

#### Next topic

scipy.special.erfinv

# scipy.special.erfi

`scipy.special.``erfi`(z) = <ufunc 'erfi'>

  Imaginary error function, `-i erf(i z)`.

  See also

  `erf`, `erfc`, `erfcx`, `dawsn`, `wofz`

  Notes

  New in version 0.12.0.

  References

  [R386] | Steven G. Johnson, Faddeeva W function implementation. http://ab-initio.mit.edu/Faddeeva

  Examples

      >>> from scipy import special
      >>> import matplotlib.pyplot as plt
      >>> x = np.linspace(-3, 3)
      >>> plt.plot(x, special.erfi(x))
      >>> plt.xlabel('$x$')
      >>> plt.ylabel('$erfi(x)$')
      >>> plt.show()

  (Source code)