15.37.17  LIMITED     

Fits points between the specified limits.  If limits  are  not  specified,
the  default  is the current plot limit.  See:Command SET LIMITS.  You may
specify up to 5 sets of limits.  This allows you to fit the data using  up
to 5 regions, and omitting the rest of the data. 
     1.  X - Specifies X limit
     2.  Y - Specifies Y limit
     3.  Z - Specifies the Z limit
     4.  CURSOR  - Brings up the cursor.  You move it to the X,Y value you
         wish then press the space bar to enter both X,Y or X to  enter  X
         or Y to enter Y.
     5.  RECURSOR  -  The  cursor enters all regions from the current one,
         until you type "Q".
     6.  VLOG  -  Draws  a cross when you press the space bar, and draws a
         dotted line around the final limits.

                                  example
     TD:FIT POLY TERMS=3 LIMITED FROM 1,1 to 2,5
          or...
     TD:FIT POLY TERMS=3 LIMITED FROM X=1 Y=1 TO X=2 Y=5
Fits  all  points  that  with  X  between  1  and  2 and Y between 2 and 5
inclusive.
     TD:FIT POLY TERMS=3 LIMITED FROM Y=1 TO Y=5
Fits all data points with Y values between 1 and 5 inclusive.
     TD:FIT POLY TERMS=3 LIMITED FROM CURSOR TO CURSOR
Fits all data points as defined by the cursor limits.
     TD:FIT POLY TERMS=3 LIMITED FROM X=CURSOR TO X=CURSOR
Fits all data points according to X values defined by the cursor.
TD:FIT POLY TERMS=3 LIMITED FROM 1 to 20 FROM 40 TO 80
Fits a parabola to data in 2 regions, and skips the X values 20 to 40.
     TD:FIT POLY TERMS=3 LIMITED VLOG RECURSOR
Fits  a parabola to the data for the regions selected by the cursor.  Both
X and Y values are determinded  by  the  cursor.   Each  cursor  value  is
entered  by  pressing the space bar.  After the last region, Press the "Q"
key to quit.
     TD:FIT POLY TERMS=3 LIMITED VLOG X=RECURSOR
This  is  the  same  as  above,  except  that only X values are entered by
cursor.