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<H1><A NAME="SECTION004180000000000000000"> </A><A NAME="window__defaults"> </A><A NAME="912"> </A><A NAME="913"> </A>
<BR>
The Defaults Window
</H1>
<BR>
<DIV ALIGN="CENTER"><A NAME="defaults"> </A><A NAME="937"> </A>
<TABLE WIDTH="50%">
<CAPTION><STRONG>Figure 2.18:</STRONG>
The Defaults window.</CAPTION>
<TR><TD>31#31</TD></TR>
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<DL>
<DD><P>
<DT><STRONG>Window title:</STRONG>
<DD>DsTool: Defaults
<DT><STRONG>Function:</STRONG>
<DD>The Defaults window allows the user to change
some of DsTool's default settings.
<DT><STRONG>Description:</STRONG>
<DD>The Defaults window is opened by selecting the
Defaults option from the Panels menu button located in the
Command window. The user can change some of DsTool's values which control the
computation and display of data. Changing a default value
will not change data which has been previously computed, but
will be used to compute future data, and to display all data.
<DT><STRONG>Panel items:</STRONG>
<DD>
<UL>
<LI>Save points exclusive setting:<A NAME="921"> </A><A NAME="922"> </A>
Allows the user to choose whether data is recorded or not.
The default is to record data.
<LI>Auto refresh 2-D View windows exclusive setting:<A NAME="923"> </A>
Allows the user to choose whether 2-D View windows will
be automatically updated when points are cleared from memory (via the ``clear last'' or
``clear all'' buttons in the Orbits window or the ``delete'' button in the Browser
window), or the variables of the 2-D View window are changed. If it is set to off, the
2-D View windows will not be updated when the previous events occur. In either case,
when new points are computed, the new points will be plotted on all existing 2-D View windows.
The default is to auto refresh 2-D View windows.
<LI>Plotting symbol stack setting:<A NAME="924"> </A><A NAME="925"> </A>
Allows the user to choose the symbol with which trajectories are plotted.
It is possible to choose to plot with a dot, a cross, a triangle, and a box. Each
of these types come in three sizes: small, medium, and large. The default symbol is ``medium dot''.
<LI>Display points after computing numeric field:<A NAME="926"> </A>
Displays the number of points to compute before
storing and displaying points. Smaller values will cause slower plotting, due to
the overhead of using X windows routines. Higher values will cause faster plotting, at the expense
of not seeing the trajectory evolve in time. The default value is 100.
<LI>Diverging orbit cutoff read-write text field:<A NAME="927"> </A><A NAME="928"> </A>
Displays the number DsTool will use to decide whether an orbit has diverged to infinity.
If the distance from a point to the origin is greater than this number,
the orbit containing that point is deemed to have diverged, and DsTool will stop
calculation. The default value is 10<SUP>8</SUP>.
<LI>Auto-scaling factor read-write text field:<A NAME="930"> </A><A NAME="931"> </A>
Displays the padding factor which determines how the auto-scaling feature on
2-D View windows sets the horizontal and vertical ranges.
To find the auto-scaled range for a variable, DsTool first computes
the minimum interval <I>R</I> required to plot all previously computed data points for that variable.
DsTool then resets the range to be the interval centered at the midpoint of <I>R</I> with length given
by the auto-scaling factor times the length of <I>R</I>.
Consequently, an auto-scaling factor
greater than 1 will allow all of the currently computed data to be plotted, whereas
an auto-scaling factor less than 1 will exclude some of the data. The default
value is 1.1.
<LI><EM>Name</EM> Minimum read-write text field:
Displays the default minimum value for viewing the variable, parameter, or auxiliary function.
<LI><EM>Name</EM> Maximum read-write text field:
Displays the default maximum value for viewing the variable, parameter, or auxiliary function.
<LI>Dismiss command button:
Closes the Defaults window.
</UL></DL>
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<ADDRESS>
<I>John Lapeyre</I>
<BR><I>1998-09-04</I>
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