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39 lines
1.7 KiB
39 lines
1.7 KiB
2 years ago
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The following are the time step selection parameters:
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\negmedskip
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\setlength{\itemsep}{0pt} \begin{itemize}
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\item \param{tmin} is the minimum selected time,
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\item \param{tmax} is the maximum selected time,
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\item \param{nintv} is the number of selected time intervals, and
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\item \param{delt} is the selected time interval.
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\end{itemize}
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In the interval-times mode, up to \param{nintv} time steps at interval
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\param{delt} between \param{tmin} and \param{tmax} are selected. The
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mode may have a delta offset or a zero offset. With a delta offset, the
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first selected time is \param{tmin}+\param{delt}; with a zero offset, it
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is \param{tmin}.
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In the interval-times mode with a delta offset, the number of selected
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time intervals \param{nintv} and the selected time interval \param{delt}
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are related mathematically by the equations:
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\begin{center} \begin{tabular}{cl}
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$delt$ = $(tmax-tmin) / nintv$ & (1) \\
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$nintv$ = \cmd{int} $((tmin-tmax) / delt)$ & (2) \\
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\end{tabular} \end{center}
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With a zero offset, \param{nintv} and \param{delt} are related
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mathematically by the equations:
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\begin{center} \begin{tabular}{cl}
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$delt$ = $(tmax-tmin) / (nintv-1)$ & (1) \\
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$nintv$ = \cmd{int} $((tmin-tmax) / delt) + 1$ & (2) \\
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\end{tabular} \end{center}
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The user specifies either \param{nintv} or \param{delt}. If
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\param{nintv} is specified, \param{delt} is calculated using equation 1.
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If \param{delt} is specified, \param{nintv} is calculated using equation
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2.
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In the all-available-times mode, all database time steps between
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\param{tmin} and \param{tmax} are selected (parameters \param{nintv} and
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\param{delt} are ignored). In the user-selected-times mode, the
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specified times are selected (all parameters are ignored).
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