class ROOT::Fit::BinData: public ROOT::Fit::FitData

      constructor from dimension of point  and max number of points (to pre-allocate vector)
      Give a zero value and then use Initialize later one if the size is not known

      constructor from option and default range

      constructor from options and range
      efault is 1D and value errors

 constructurs using external data 

      constructor from external data for 1D with errors on  coordinate and value

      constructor from external data for 2D with errors on  coordinate and value

      constructor from external data for 3D with errors on  coordinate and value

      copy constructor

       assignment operator

      destructor

      preallocate a data set given size and dimension
      need to be initialized with the with the right dimension before

      return the size of a fit point (is the coordinate dimension + 1 for the value and eventually
      the number of all errors

      return the size of internal data  (number of fit points)
      if data are not copied in but used externally the size is 0

      flag to control if data provides error on the coordinates

      flag to control if data provides asymmetric errors on the value

      add one dim data with only coordinate and values

      add one dim data with no error in the coordinate (x)
      in this case store the inverse of the error in the value (y)

      add one dim data with  error in the coordinate (x)
      in this case store the value (y)  error and not the inverse

      add one dim data with  error in the coordinate (x) and asymmetric errors in the value (y)
      in this case store the y errors and not the inverse

      add multi-dim coordinate data with only value (no errors)

      add multi-dim coordinate data with only error in value

      add multi-dim coordinate data with both error in coordinates and value

      return a pointer to the coordinates data for the given fit point

      return the value for the given fit point

      return error on the value for the given fit point
      Safe (but slower) method returning correctly the error on the value
      in case of asymm errors return the average 0.5(eu + el)

      Return the inverse of error on the value for the given fit point
      useful when error in the coordinates are not stored and then this is used directly this as the weight in
      the least square function

      Return a pointer to the errors in the coordinates for the given fit point

      retrieve at the same time a  pointer to the coordinate data and the fit value
      More efficient than calling Coords(i) and Value(i)

      retrieve in a single call a pointer to the coordinate data, value and inverse error for
      the given fit point.
      To be used only when type is kValueError otherwise the error is returned and not the inverse

      Retrieve the errors on the point (coordinate and value) for the given fit point
      It must be called only when the coordinate errors are stored otherwise it will produce an
      assert.

      Get errors on the point (coordinate errors and asymmetric value errors) for the
      given fit point.
      It must be called only when the coordinate errors and asymmetric errors are stored
      otherwise it will produce an assert.

      resize the vector to the given npoints

      return number of fit points

      return number of fit points
      In case of integral option size is npoints -1

      return coordinate data dimension

      apply a Log transformation of the data values
      can be used for example when fitting an exponential or gaussian
      Transform the data in place need to copy if want to preserve original data
      The data sets must not contain negative values. IN case it does,
      an empty data set is returned