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;; Example IDL code

FUNCTION mean_and_stddev,array

  ;; This program reads in an array of numbers

  ;; and returns a structure containing the

  ;; average and standard deviation

​

  ave = 0.0

  count = 0.0

​

  for i=0,N_ELEMENTS(array)-1 do begin

      ave = ave + array[i]

      count = count + 1

  endfor

  ave = ave/count

​

  std = stddev(array)  

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  return, {average:ave,std:std}

​

END

​