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# scipy.special.chndtridf

scipy.special.chndtridf(x, p, nc, out=None) = <ufunc 'chndtridf'>

  Inverse to `chndtr` vs df

  Calculated using a search to find a value for df that produces the desired value of p.

  Parameters:
    xarray_like

      Upper bound of the integral; must satisfy `x >= 0`

    parray_like

      Probability; must satisfy `0 <= p < 1`

    ncarray_like

      Non-centrality parameter; must satisfy `nc >= 0`

    outndarray, optional

      Optional output array for the function results

  Returns:
    dfscalar or ndarray

      Degrees of freedom

  See also

  `chndtr`, `chndtrix`, `chndtrinc`