Watlow ANAWIN 2 - Manual (Page 73)

Using the Trend Plot Screen
AnaWin User’s Guide 7-11
Scale: The options in the Scale panel are always the same for X and Y
graphs, though the default setting and the effects of each option vary.
• Zero Origin (default for all X and Y graphs except time series):
Select Zero Origin to draw the axis including the origin (zero) and
extending far enough in the positive and negative directions to include
all of the graph's values.
• Variable Origin: Select Variable Origin to have the axis “zoom in” on
the range of the graph's actual values, whether or not that range
includes zero. For the X axis, this option differs from Auto only if you
specify X values for data points.
• User-Defined (default for time series graphs): Select User-Defined
to set your own values for the minimum, maximum, and number of
ticks for the axis. When you select User-Defined, the settings in the
Range panel are enabled.
Range: The options in the Range panel are enabled only if you select
User-Defined in the Scale panel. The effect of each setting depends on
the nature of the data.
• Max: The Max setting is generally the maximum point of the axis,
with the following exceptions:
• If you have a positive Max with a negative Min, the Graph
Control may adjust the maximum or minimum point so that
it lies on a tick.
• For X axes without specific X values, the Max setting is
ignored. The maximum point of the axis is equal to the num-
ber of points or sets you are graphing.
• Min: The Min setting is generally the minimum point of the axis, with
the following exceptions:
• If you have a positive Max with a negative Min, the Graph
Control may adjust the maximum or minimum point so that
it lies on a tick.
• For X axes without specific X values, the Min setting is
ignored. The minimum point of the axis is always 0.
• Ticks: The Ticks setting determines the number of ticks along the
selected axis. (Note that ticks are distinct from tick marks, see “Tick
Marks,” later in this section for details about tick marks.) The effect
depends on the axis and the nature of your data.
• For Y axes and X axes with specific X values the Ticks set-
ting specifies the number of ticks from the origin to the set-
ting of either Max or Min, whichever has the higher
magnitude (distance from 0). For example, if you set Min to -
50 and Max to 20, Ticks applies to the axis segment between
0 and -50.
• To determine the Ticks value you want to set, divide the
length of the axis (or axis segment) by the desired interval