ll)<br>
</h4>
A common way to plot a set of 1D curves which depend on a parameter is
to plot them side by side (waterfall style), so as to form a surface.
Let us build an
array of 1D objects and assign it an additional axis.<br>
<pre style="margin-left: 40px;">&gt;&gt; x=-pi:0.01:pi; a=<span style="color: rgb(51, 102, 255);">iData</span>(x,x); <br>&gt;&gt; a.Error=0;                         <span style="font-style: italic;">% replace default Error=sqrt(Signal) by no-error.</span><br>&gt;&gt; b=<span style="