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Hi there<br>
<br>
I have a bunch of data which I'm trying to plot in a 3D plot.
Background - it's impedance measurements of a loudspeaker, measured
at different input voltages. I have:<br>
<br>
voltage = [0.1 0.4 0.7 1.0];<br>
f = a vector of frequencies (from 1.4 Hz to 20000 Hz ... I have a
total of 27000 data points in this vector)<br>
m = a matrix of magnitude values, dimension matches frequency f and
voltage.<br>
<br>
The frequency axis should be plotted on a logarithmic plot.
Otherwise I get the strangest looking plot (basically just a dashed
line with the axes - no graphs).<br>
<br>
I solved this by plotting: <br>
<pre style="font-family:Monospaced;font-style:normal;font-size:12.0;"><span style="color:rgb(50,185,185);">plot3d</span><span style="color:rgb(74,85,219);">(</span><span style="color:rgb(0,0,0);">voltage</span><span style="color:rgb(0,0,0);">,</span><span style="color:rgb(174,92,176);text-decoration:underline;">log10</span><span style="color:rgb(74,85,219);">(</span><span style="color:rgb(0,0,0);">f</span><span style="color:rgb(74,85,219);">)</span><span style="color:rgb(0,0,0);">,</span><span style="color:rgb(0,0,0);">m</span><span style="color:rgb(92,92,92);">'</span><span style="color:rgb(0,0,0);">,</span><span style="color:rgb(0,0,0);">alpha</span><span style="color:rgb(92,92,92);">=</span><span style="color:rgb(188,143,143);">35</span><span style="color:rgb(0,0,0);">,</span><span style="color:rgb(0,0,0);">theta</span><span style="color:rgb(92,92,92);">=</span><span style="color:rgb(188,143,143);">45</span><span style="color:rgb(0,0,0);">,</span><span style="color:rgb(0,0,0)
;">flag</span><span style="color:rgb(92,92,92);">=</span><span style="color:rgb(74,85,219);">[</span><span style="color:rgb(188,143,143);">2</span><span style="color:rgb(0,0,0);">,</span><span style="color:rgb(188,143,143);">2</span><span style="color:rgb(0,0,0);">,</span><span style="color:rgb(188,143,143);">3</span><span style="color:rgb(74,85,219);">]</span><span style="color:rgb(74,85,219);">)</span><span style="color:rgb(0,0,0);">;</span></pre>
When I plot a 2D plot, I can simply write something like <br>
<pre style="font-family:Monospaced;font-style:normal;font-size:12.0;"><span style="color:rgb(0,0,0);">a</span><span style="color:rgb(92,92,92);">.</span><span style="color:rgb(170,170,170);">log_flags</span> <span style="color:rgb(92,92,92);">=</span> <span style="color:rgb(188,143,143);">"</span><span style="color:rgb(188,143,143);">nln</span><span style="color:rgb(188,143,143);">"</span><span style="color:rgb(0,0,0);">;</span></pre>
... But what should I do in a 3D plot ???<br>
<br>
Best regards,<br>
Claus<br>
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