PASS         <top_margin>               FIELD            SHARE? N
      PASS         <bottom_margin>            FIELD            SHARE? N
      GOSUB    0CD .AXIS SET AXIS MARGIN

.AXIS SET AXIS MARGIN

This subroutine reserves margins at the end of the "current" axis

Usage:

* Opt PASS         <top_margin>               FIELD            SHARE? N
* Opt PASS         <bottom_margin>            FIELD            SHARE? N
*     GOSUB    0CD .AXIS SET AXIS MARGIN
      *        Check for error
*     IF       0CD .AXIS SET AXIS MARGIN      NE

Description:

This subroutine reserves margins at the end of the "current" axis. You must have selected a "current" axis via .AXIS SET CURRENT before calling this routine.

If a parameter is not received or if the value received is blank, then the margin is cleared.

This is usually used to reserve space in the plot area. For example, if some margin is reserved at the top of the vertical y-axis, the top of the plot area will contain no data points. It is because this region would be outside the active range of the y-axis. If anything is put at the top of the plot area (such as a legend box or custom text), it will not overlap with the data points.

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-- JeanNeron - 2011-11-09