code: def output_F(results, contrast):
      """
      This convenience function outputs the results of an Fcontrast
      from a regression
  
      Parameters
      ----------
      results : object
          implementing Tcontrast method
      contrast : array
          contrast matrix
  
      Returns
      -------
      F : array
          array of F values
      """
      return results.Fcontrast(contrast).F
  
file_path: nipy/nipy/modalities/fmri/fmristat/outputters.py
imports: import numpy
label_desc: Use image node_id 2 for calling a global function with example usage: output_F(results, contrast) and returns: results