text: """ 
  Remap a dataframe: change names, and perform operations (e.g. change units, scale, combine signals)
  """
  import numpy as np
  import pandas as pd
  import matplotlib.pyplot as plt
  import os
  # Local 
  import welib.weio as io
  import welib.fast.postpro as postpro
  #import pyFAST.input_output as io 
  #import pyFAST.input_output.postpro as postpro
  
  
  if __name__ == '__main__':
      ColumnMap={
        'WS_[m/s]'         : '{Wind1VelX_[m/s]}'             , # create a new column from existing one
        'RtTSR_[-]'        : '{RtTSR_[-]} * 2  +  {RtAeroCt_[-]}'    , # change value of column
        'RotSpeed_[rad/s]' : '{RotSpeed_[rpm]} * 2*np.pi/60 ', # new column [rpm] -> [rad/s]
      }
  
      # Get current directory so this script can be called from any location
      MyDir=os.path.dirname(__file__)
      # --- Step 1: Read an openfast output file
      outFile = os.path.join(MyDir,'../../../data/example_files/fastout_allnodes.outb')
      df = io.fast_output_file.FASTOutputFile(outFile).toDataFrame()
      # Change columns based on formulae, potentially adding new columns
      df = postpro.remap_df(df, ColumnMap)
  
      #df.to_csv('_Out.csv', index=False)
  