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<a name="Axis-and-Colorbar"></a>
<table cellpadding="1" cellspacing="1" border="0">
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<td valign="middle" align="left">[<a href="mathgl_en_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
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<a name="Axis-and-Colorbar-1"></a>
<h2 class="section">4.8 Axis and Colorbar</h2>
<a name="index-Axis-1"></a>
<a name="index-Box"></a>
<a name="index-Grid"></a>
<a name="index-Colorbar"></a>
<a name="index-Label-1"></a>

<p>These functions draw the &ldquo;things for measuring&rdquo;, like axis with ticks, colorbar with ticks, grid along axis, bounding box and labels for axis. For more information see <a href="mathgl_en_32.html#Axis-settings">Axis settings</a>.
</p>
<p><a name="axis"></a>
</p><dl>
<dt><a name="index-axis-2"></a><u>MGL command:</u> <b>axis</b><i> ['dir'='xyz' 'stl'='']</i></dt>
<dt><a name="index-Axis-2"></a><u>Method on <code>mglGraph</code>:</u> <code>void</code> <b>Axis</b><i> (<code>const char *</code>dir=<code>&quot;xyz&quot;</code>, <code>const char *</code>stl=<code>&quot;&quot;</code>, <code>const char *</code>opt=<code>&quot;&quot;</code>)</i></dt>
<dt><a name="index-mgl_005faxis"></a><u>C function:</u> <code>void</code> <b>mgl_axis</b><i> (<code>HMGL</code> gr, <code>const char *</code>dir, <code>const char *</code>stl, <code>const char *</code>opt)</i></dt>
<dd><p>Draws axes with ticks (see <a href="mathgl_en_32.html#Axis-settings">Axis settings</a>). Parameter <var>dir</var> may contain:
</p><ul>
<li>
&lsquo;<samp>xyz</samp>&rsquo; for drawing axis in corresponding direction;
</li><li>
&lsquo;<samp>XYZ</samp>&rsquo; for drawing axis in corresponding direction but with inverted positions of labels;
</li><li>
&lsquo;<samp>_</samp>&rsquo; for disabling tick labels;
</li><li>
&lsquo;<samp>U</samp>&rsquo; for disabling rotation of tick labels;
</li><li>
&lsquo;<samp>AKDTVISO</samp>&rsquo; for drawing arrow at the end of axis;
</li><li>
&lsquo;<samp>a</samp>&rsquo; for forced adjusting of axis ticks.
</li></ul>
<p>Styles of ticks and axis can be overrided by using <var>stl</var> string. See section <a href="mathgl_en_11.html#Axis-and-ticks">Axis and ticks</a>, for sample code and picture.
</p></dd></dl>

<p><a name="colorbar"></a>
</p><dl>
<dt><a name="index-colorbar"></a><u>MGL command:</u> <b>colorbar</b><i> ['sch'='']</i></dt>
<dt><a name="index-Colorbar-1"></a><u>Method on <code>mglGraph</code>:</u> <code>void</code> <b>Colorbar</b><i> (<code>const char *</code>sch=<code>&quot;&quot;</code>)</i></dt>
<dt><a name="index-mgl_005fcolorbar"></a><u>C function:</u> <code>void</code> <b>mgl_colorbar</b><i> (<code>HMGL</code> gr, <code>const char *</code>sch)</i></dt>
<dd><p>Draws colorbar. Parameter <var>sch</var> may contain:
</p><ul>
<li>
color scheme (see <a href="mathgl_en_24.html#Color-scheme">Color scheme</a>);
</li><li>
&lsquo;<samp>&lt;&gt;^_</samp>&rsquo; for positioning at left, at right, at top or at bottom correspondingly;
</li><li>
&lsquo;<samp>I</samp>&rsquo; for positioning near bounding (by default, is positioned at edges of subplot);
</li><li>
&lsquo;<samp>A</samp>&rsquo; for using absolute coordinates.
</li></ul>
<p>See section <a href="mathgl_en_11.html#Colorbars">Colorbars</a>, for sample code and picture.
</p></dd></dl>

<dl>
<dt><a name="index-colorbar-1"></a><u>MGL command:</u> <b>colorbar</b><i> vdat ['sch'='']</i></dt>
<dt><a name="index-Colorbar-2"></a><u>Method on <code>mglGraph</code>:</u> <code>void</code> <b>Colorbar</b><i> (<code>const mglDataA &amp;</code>v, <code>const char *</code>sch=<code>&quot;&quot;</code>)</i></dt>
<dt><a name="index-mgl_005fcolorbar_005fval"></a><u>C function:</u> <code>void</code> <b>mgl_colorbar_val</b><i> (<code>HMGL</code> gr, <code>HCDT</code> v, <code>const char *</code>sch)</i></dt>
<dd><p>The same as previous but with sharp colors <var>sch</var> (current palette if <code>sch=&quot;&quot;</code>) for values <var>v</var>. See section <a href="mathgl_en_15.html#ContD-sample">ContD sample</a>, for sample code and picture.
</p></dd></dl>

<dl>
<dt><a name="index-colorbar-2"></a><u>MGL command:</u> <b>colorbar</b><i> 'sch' <code>x y [w=1 h=1]</code></i></dt>
<dt><a name="index-Colorbar-3"></a><u>Method on <code>mglGraph</code>:</u> <code>void</code> <b>Colorbar</b><i> (<code>const char *</code>sch, <code>mreal</code> x, <code>mreal</code> y, <code>mreal</code> w=<code>1</code>, <code>mreal</code> h=<code>1</code>)</i></dt>
<dt><a name="index-mgl_005fcolorbar_005fext"></a><u>C function:</u> <code>void</code> <b>mgl_colorbar_ext</b><i> (<code>HMGL</code> gr, <code>const char *</code>sch, <code>mreal</code> x, <code>mreal</code> y, <code>mreal</code> w, <code>mreal</code> h)</i></dt>
<dd><p>The same as first one but at arbitrary position of subplot {<var>x</var>, <var>y</var>} (supposed to be in range [0,1]). Parameters <var>w</var>, <var>h</var> set the relative width and height of the colorbar.
</p></dd></dl>

<dl>
<dt><a name="index-colorbar-3"></a><u>MGL command:</u> <b>colorbar</b><i> vdat 'sch' <code>x y [w=1 h=1]</code></i></dt>
<dt><a name="index-Colorbar-4"></a><u>Method on <code>mglGraph</code>:</u> <code>void</code> <b>Colorbar</b><i> (<code>const mglDataA &amp;</code>v, <code>const char *</code>sch, <code>mreal</code> x, <code>mreal</code> y, <code>mreal</code> w=<code>1</code>, <code>mreal</code> h=<code>1</code>)</i></dt>
<dt><a name="index-mgl_005fcolorbar_005fval_005fext"></a><u>C function:</u> <code>void</code> <b>mgl_colorbar_val_ext</b><i> (<code>HMGL</code> gr, <code>HCDT</code> v, <code>const char *</code>sch, <code>mreal</code> x, <code>mreal</code> y, <code>mreal</code> w, <code>mreal</code> h)</i></dt>
<dd><p>The same as previous but with sharp colors <var>sch</var> (current palette if <code>sch=&quot;&quot;</code>) for values <var>v</var>. See section <a href="mathgl_en_15.html#ContD-sample">ContD sample</a>, for sample code and picture.
</p></dd></dl>

<p><a name="grid"></a>
</p><dl>
<dt><a name="index-grid"></a><u>MGL command:</u> <b>grid</b><i> ['dir'='xyz' 'pen'='B']</i></dt>
<dt><a name="index-Grid-1"></a><u>Method on <code>mglGraph</code>:</u> <code>void</code> <b>Grid</b><i> (<code>const char *</code>dir=<code>&quot;xyz&quot;</code>, <code>const char *</code>pen=<code>&quot;B&quot;</code>, <code>const char *</code>opt=<code>&quot;&quot;</code>)</i></dt>
<dt><a name="index-mgl_005faxis_005fgrid"></a><u>C function:</u> <code>void</code> <b>mgl_axis_grid</b><i> (<code>HMGL</code> gr, <code>const char *</code>dir, <code>const char *</code>pen, <code>const char *</code>opt)</i></dt>
<dd><p>Draws grid lines perpendicular to direction determined by string parameter <var>dir</var>. The step of grid lines is the same as tick step for <a href="#axis">axis</a>. The style of lines is determined by <var>pen</var> parameter (default value is dark blue solid line &lsquo;<samp>B-</samp>&rsquo;).
</p></dd></dl>

<p><a name="box"></a>
</p><dl>
<dt><a name="index-box"></a><u>MGL command:</u> <b>box</b><i> ['stl'='k' <code>ticks=on</code>]</i></dt>
<dt><a name="index-Box-1"></a><u>Method on <code>mglGraph</code>:</u> <code>void</code> <b>Box</b><i> (<code>const char *</code>col=<code>&quot;&quot;</code>, <code>bool</code> ticks=<code>true</code>)</i></dt>
<dt><a name="index-mgl_005fbox"></a><u>C function:</u> <code>void</code> <b>mgl_box</b><i> (<code>HMGL</code> gr, <code>int</code> ticks)</i></dt>
<dt><a name="index-mgl_005fbox_005fstr"></a><u>C function:</u> <code>void</code> <b>mgl_box_str</b><i> (<code>HMGL</code> gr, <code>const char *</code>col, <code>int</code> ticks)</i></dt>
<dd><p>Draws bounding box outside the plotting volume with color <var>col</var>. If <var>col</var> contain &lsquo;<samp>@</samp>&rsquo; then filled faces are drawn. At this first color is used for faces (default is light yellow), last one for edges. See section <a href="mathgl_en_11.html#Bounding-box">Bounding box</a>, for sample code and picture.
</p></dd></dl>

<p><a name="xlabel"></a>
<a name="ylabel"></a>
<a name="zlabel"></a>
<a name="tlabel"></a>
</p><dl>
<dt><a name="index-xlabel"></a><u>MGL command:</u> <b>xlabel</b><i> 'text' [<code>pos=1</code>]</i></dt>
<dt><a name="index-ylabel"></a><u>MGL command:</u> <b>ylabel</b><i> 'text' [<code>pos=1</code>]</i></dt>
<dt><a name="index-zlabel"></a><u>MGL command:</u> <b>zlabel</b><i> 'text' [<code>pos=1</code>]</i></dt>
<dt><a name="index-tlabel"></a><u>MGL command:</u> <b>tlabel</b><i> 'text' [<code>pos=1</code>]</i></dt>
<dt><a name="index-Label-2"></a><u>Method on <code>mglGraph</code>:</u> <code>void</code> <b>Label</b><i> (<code>char</code> dir, <code>const char *</code>text, <code>mreal</code> pos=<code>1</code>, <code>const char *</code>opt=<code>&quot;&quot;</code>)</i></dt>
<dt><a name="index-Label-3"></a><u>Method on <code>mglGraph</code>:</u> <code>void</code> <b>Label</b><i> (<code>char</code> dir, <code>const wchar_t *</code>text, <code>mreal</code> pos=<code>1</code>, <code>const char *</code>opt=<code>&quot;&quot;</code>)</i></dt>
<dt><a name="index-mgl_005flabel"></a><u>C function:</u> <code>void</code> <b>mgl_label</b><i> (<code>HMGL</code> gr, <code>char</code> dir, <code>const char *</code>text, <code>mreal</code> pos, <code>const char *</code>opt)</i></dt>
<dt><a name="index-mgl_005flabelw"></a><u>C function:</u> <code>void</code> <b>mgl_labelw</b><i> (<code>HMGL</code> gr, <code>char</code> dir, <code>const wchar_t *</code>text, <code>mreal</code> pos, <code>const char *</code>opt)</i></dt>
<dd><p>Prints the label <var>text</var> for axis <var>dir</var>=&lsquo;<samp>x</samp>&rsquo;,&lsquo;<samp>y</samp>&rsquo;,&lsquo;<samp>z</samp>&rsquo;,&lsquo;<samp>t</samp>&rsquo; (here &lsquo;<samp>t</samp>&rsquo; is &ldquo;ternary&rdquo; axis <em>t=1-x-y</em>). The position of label is determined by <var>pos</var> parameter. If <var>pos</var>=0 then label is printed at the center of axis. If <var>pos</var>&gt;0 then label is printed at the maximum of axis. If <var>pos</var>&lt;0 then label is printed at the minimum of axis. Value option set additional shifting of the label. See section <a href="mathgl_en_36.html#Text-printing">Text printing</a>.
</p></dd></dl>


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