Qwt log scale for frequency

[uz_qt]

Hello,

I would like have x-axis of my Qwt plot in logarithmic scale. I have seen the bode example but was not able to implement it as desired. (I think some classes have been changed/renamed).
I would like to have the x-scale as shown in the attached plot1.jpg

So far, I have written the following lines:

QwtText XAxisLabel;
   XAxisLabel.setText("Frequency [Hz]");
   setAxisTitle(QwtPlot::xBottom, XAxisLabel);
   setAxisScaleEngine(QwtPlot::xBottom, new QwtLogScaleEngine);

QwtText XAxisLabel;
   XAxisLabel.setText("Frequency [Hz]");
   setAxisTitle(QwtPlot::xBottom, XAxisLabel);
   setAxisScaleEngine(QwtPlot::xBottom, new QwtLogScaleEngine);

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Please help me.

---

Added after 31 minutes:

Got it! :-)
Following is the solution:

QwtText XAxisLabel;
   XAxisLabel.setText("Frequency [Hz]");
   setAxisTitle(QwtPlot::xBottom, XAxisLabel);
   setAxisMaxMajor(QwtPlot::xBottom, 6);   
   setAxisMaxMinor(QwtPlot::xBottom, 10);
   setAxisScaleEngine(QwtPlot::xBottom, new QwtLogScaleEngine);
   setAxisScale(QwtPlot::xBottom, 10.0, 5000.0);

QwtText XAxisLabel;
   XAxisLabel.setText("Frequency [Hz]");
   setAxisTitle(QwtPlot::xBottom, XAxisLabel);
   setAxisMaxMajor(QwtPlot::xBottom, 6);   
   setAxisMaxMinor(QwtPlot::xBottom, 10);
   setAxisScaleEngine(QwtPlot::xBottom, new QwtLogScaleEngine);
   setAxisScale(QwtPlot::xBottom, 10.0, 5000.0);

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