class TAxis: public TNamed, public TAttAxis

 Default constructor.

 Axis constructor for axis with fix bin size

 Axis constructor for variable bin size

 Destructor.

 Copy constructor.

 Assignment operator.

 Choose a reasonable time format from the coordinates in the active pad
 and the number of divisions in this axis
 If orientation = "X", the horizontal axis of the pad will be used for ref.
 If orientation = "Y", the vertical axis of the pad will be used for ref.

 Copy axis structure to another axis

 Compute distance from point px,py to an axis

 Execute action corresponding to one event

  This member function is called when an axis is clicked with the locator

  The axis range is set between the position where the mouse is pressed
  and the position where it is released.
  If the mouse position is outside the current axis range when it is released
  the axis is unzoomed with the corresponding proportions.
  Note that the mouse does not need to be in the pad or even canvas
  when it is released.

 Find bin number corresponding to abscissa x. NOTE: this method does not work with alphanumeric bins !!!

 If x is underflow or overflow, attempt to extend the axis if TAxis::kCanExtend is true.
 Otherwise, return 0 or fNbins+1.

 Find bin number with label.
 If the List of labels does not exist create it and make the axis alphanumeric
 If one wants just to add a single label- just call TAxis::SetBinLabel
 If label is not in the list of labels do the following depending on the
 bit TAxis::kCanExtend; of the axis.
   - if the bit is set add the new label and if the number of labels exceeds
      the number of bins, double the number of bins via TH1::LabelsInflate
   - if the bit is not set and the histogram has labels in each bin
        set the bit automatically and consider the histogram as alphanumeric
     if histogram has only some bins with labels then the histogram is not
     consider alphanumeric and return -1

 -1 is returned only when the Axis has no parent histogram

 Find bin number with label.
 If the List of labels does not exist or the label doe not exist just return -1 .
 Do not attempt to modify the axis. This is different than FindBin

 Find bin number corresponding to abscissa x

 Identical to TAxis::FindBin except that if x is an underflow/overflow
 no attempt is made to extend the axis.

 Return label for bin

             return first bin on the axis
       ie 1 if no range defined
       NOTE: in some cases a zero is returned (see TAxis::SetRange)

             return last bin on the axis
       ie fNbins if no range defined
       NOTE: in some cases a zero is returned (see TAxis::SetRange)

 Return center of bin

 Return center of bin in log
 With a log-equidistant binning for a bin with low and up edges, the mean is :
 0.5*(ln low + ln up) i.e. sqrt(low*up) in logx (e.g. sqrt(10^0*10^2) = 10).
Imagine a bin with low=1 and up=100 :
 - the center in lin is (100-1)/2=50.5
 - the center in log would be sqrt(1*100)=10 (!=log(50.5))
 NB: if the low edge of the bin is negative, the function returns the bin center
     as computed by TAxis::GetBinCenter

 Return low edge of bin

 Return up edge of bin

 Return bin width

 Return an array with the center of all bins

 Return an array with the lod edge of all bins

 Return *only* the time format from the string fTimeFormat

 Return the ticks option (see SetTicks)

 this helper function checks if there is a bin without a label
 if all bins have labels, the axis can / will become alphanumeric

  Set option(s) to draw axis with labels
  option = "a" sort by alphabetic order
         = ">" sort by decreasing values
         = "<" sort by increasing values
         = "h" draw labels horizonthal
         = "v" draw labels vertical
         = "u" draw labels up (end of label right adjusted)
         = "d" draw labels down (start of label left adjusted)

 Copy axis attributes to this

 Save axis attributes as C++ statement(s) on output stream out

 Initialize axis with fix bins

 Initialize axis with variable bins

 Initialize axis with variable bins

 Set axis default values (from TStyle)

 Set label for bin
 If no label list exists, it is created. If all the bins have labels, the
 axis becomes alphanumeric and extendable.
 New labels will not be added with the Fill method but will end-up in the
 underflow bin. See documentation of TAxis::FindBin(const char*)

  Set the viewing range for the axis from bin first to last
  To set a range using the axis coordinates, use TAxis::SetRangeUser.

  Set the viewing range for the axis from ufirst to ulast (in user coordinates)
  To set a range using the axis bin numbers, use TAxis::SetRange.

  set ticks orientation
  option = "+"  ticks drawn on the "positive side" (default)
  option = "-"  ticks drawn on the "negative side"
  option = "+-" ticks drawn on both sides

 Change the format used for time plotting

  The format string for date and time use the same options as the one used
  in the standard strftime C function, i.e. :
    for date :
      %a abbreviated weekday name
      %b abbreviated month name
      %d day of the month (01-31)
      %m month (01-12)
      %y year without century

    for time :
      %H hour (24-hour clock)
      %I hour (12-hour clock)
      %p local equivalent of AM or PM
      %M minute (00-59)
      %S seconds (00-61)
      %% %

    This function allows also to define the time offset. It is done via %F
    which should be appended at the end of the format string. The time
    offset has the following format: 'yyyy-mm-dd hh:mm:ss'
    Example:

          h = new TH1F("Test","h",3000,0.,200000.);
          h->GetXaxis()->SetTimeDisplay(1);
          h->GetXaxis()->SetTimeFormat("%d\/%m\/%y%F2000-02-28 13:00:01");

    This defines the time format being "dd/mm/yy" and the time offset as the
    February 28th 2003 at 13:00:01

    If %F is not specified, the time offset used will be the one defined by:
    gStyle->SetTimeOffset. For example like that:

          TDatime da(2003,02,28,12,00,00);
          gStyle->SetTimeOffset(da.Convert());

 Change the time offset
 If option = "gmt", set display mode to GMT.

 Stream an object of class TAxis.

 Reset first & last bin to the full range

 Zoom out by a factor of 'factor' (default =2)
   uses previous zoom factor by default
 Keep center defined by 'offset' fixed
   ie. -1 at left of current range, 0 in center, +1 at right

 true if axis has variable bin sizes, false otherwise