[Discuss-gnuradio] Showing a time-varying quantity in GNU Radio (with qtgui)

[Minsuk Kang]

Dear all,

I'm implementing a GUI to show the time-varying wireless channel gain with qtgui.

To be specific, I want to implement is a history plot.

The X-axis is discrete time and the Y-axis is a channel gain.

And the plot should be updated (refreshed) every few seconds. 

( for example http://qwt.sourceforge.net/cpuplot.png )

I've tried with qtgui.sink_f() block.

But, the basic option 'plottime' is not appropriate for this purpose.

Is there any other way to implement it?

Minsuk Kang