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<html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>Slopefield Plots</title><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot"><link rel="home" href="index.html" title="Руководство пользователя Genius"><link rel="up" href="ch04.html" title="Chapter 4. Построение графиков"><link rel="prev" href="ch04s02.html" title="Parametric Plots"><link rel="next" href="ch04s04.html" title="Vectorfield Plots"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">Slopefield Plots</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="ch04s02.html">Prev</a> </td><th width="60%" align="center">Chapter 4. Построение графиков</th><td width="20%" align="right"> <a accesskey="n" href="ch04s04.html">Next</a></td></tr></table><hr></div><div class="sect1"><div class="titlepage"><div><div><h2 class="title" style="clear: both"><a name="genius-slopefield-plots"></a>Slopefield Plots</h2></div></div></div><p lang="en">
In the create plot window, you can also choose the <span class="guilabel">Slope field</span> notebook
tab to create a two dimensional slope field plot.
Similar operations can be
done on such graphs as can be done on the other line plots.
For plotting using the command line see the documentation of the
<a class="link" href="ch11s20.html#gel-function-SlopefieldPlot"><code class="function">SlopefieldPlot</code></a> function.
</p><p lang="en">
When a slope field is active, there is an extra <span class="guilabel">Solver</span> menu available,
through which you can bring up the solver dialog. Here you can have Genius plot specific
solutions for the given initial conditions. You can either specify initial conditions in the dialog,
or you can click on the plot directly to specify the initial point. While the solver dialog
is active, the zooming by clicking and dragging does not work. You have to close the dialog first
if you want to zoom using the mouse.
</p><p lang="en">
The solver uses the standard Runge-Kutta method.
The plots will stay on the screen until cleared. The solver will stop whenever it reaches the boundary
of the plot window. Zooming does not change the limits or parameters of the solutions,
you will have to clear and redraw them with appropriate parameters.
You can also use the
<a class="link" href="ch11s20.html#gel-function-SlopefieldDrawSolution"><code class="function">SlopefieldDrawSolution</code></a>
function to draw solutions from the command line or programs.
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