class_docstr: The Resels class.
      
class_docstr_tok: ["The","Resels","class","."]
docstr: Convert resels as `resels` to isotropic FWHM
  
  Parameters
  ----------
  resels : float
      Convert a resel value to an equivalent isotropic FWHM based on
      step sizes in self.coordmap.
  
  Returns
  -------
  fwhm : float
docstr_tok: ["Convert","resels","as","`","resels","`","to","isotropic","FWHM","Parameters","--","--","--","--","--","resels",":","float","Convert","a","resel","value","to","an","equivalent","isotropic","FWHM","based","on","step","sizes","in","self.coordmap",".","Returns","--","--","--","-","fwhm",":","float"]
code: def resel2fwhm(self, resels):
      """Convert resels as `resels` to isotropic FWHM
  
      Parameters
      ----------
      resels : float
          Convert a resel value to an equivalent isotropic FWHM based on
          step sizes in self.coordmap.
  
      Returns
      -------
      fwhm : float
      """
      return (
          np.sqrt(4 * np.log(2.0))
          * self.wedge
          * pos_recipr(np.power(resels, 1.0 / self.D))
      )
  
file_path: nipy/nipy/algorithms/fwhm.py
imports: import numpy
  from numpy.linalg import det
  from nipy.core.api import Image
  from .utils.matrices import pos_recipr
label_desc: Use image node_id 3 for calling the Resels obj's underlying member method code with example usage: obj.resel2fwhm(resels) and returns: unknown