QwtPolarSpectrogram with inverted Radius

[ishitha92]

Thanks for the response.

That would essentially work only when there is no SetInterval specified for the X and Y axis.
Because, I am using QwtMatrixRasterData and not QwtRasterData, it is mandatory that I specify X and Y axis interval.

And when I do that as mentioned earlier, the value() function is not able find the value from the matrix (only in the inverted scale).

So for a scale like this

setInterval( Qt::XAxis, QwtInterval( 0.0, 360.0 ) );
setInterval( Qt::YAxis, QwtInterval( 0.0,90.0 ) );

setInterval( Qt::XAxis, QwtInterval( 0.0, 360.0 ) );
setInterval( Qt::YAxis, QwtInterval( 0.0,90.0 ) );

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I am setting a matrix with 216 values ( 24 azimuth columns and 9 radius rows) using setValueMatrix and the value() function finds it as long as the scale is 0 to 90 and not the other way around.

[Uwe]

That would essentially work only when there is no SetInterval specified for the X and Y axis.

As long as the intervals of the axes and those from the data intersect something should be displayed.
But better start your debugger and check what is going on in QwtMatrixRasterData::value().

Uwe