QT GUI Histogram Sink

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This is a QT-based graphical sink that displays a histogram of the data.

This histogram allows you to set and change at runtime the number of points to plot at once and the number of bins in the histogram. Both x and y-axis have their own auto-scaling behavior. By default, auto-scaling the y-axis is turned on and continuously updates the y-axis max value based on the currently plotted histogram.

The x-axis auto-scaling function only updates once when clicked. This resets the x-axis to the current range of minimum and maximum values represented in the histogram. It resets any values currently displayed because the location and width of the bins may have changed.

This sink can plot messages that contain either uniform vectors of float 32 values (pmt::is_f32vector) or PDUs where the data is a uniform vector of float 32 values.


(R): Run-time adjustable

Title for the plot
Number of Points
Number of points to plot at once
Number of Bins (R)
Number of bins to sort the data into
Accumulates the data between calls to work. When accumulate is activated, the y-axis autoscaling is turned on by default as the values will quickly grow in the this direction.
Min x-axis (R)
Minimum x-axis value
Max x-axis (R)
Maximum x-axis value
Number of Inputs
Number of signals connected to sink
Update Period (R)
GUI Hint
See GUI Hint for info about how to organize multiple QT GUIs
Axis Labels
Line 1 Label
Line 1 Width
Line 1 Color
Line 1 Style
Line 1 Marker
Line 1 Alpha

Example Flowgraph

Insert description of flowgraph here, then show a screenshot of the flowgraph and the output if there is an interesting GUI. Currently we have no standard method of uploading the actual flowgraph to the wiki or git repo, unfortunately. The plan is to have an example flowgraph showing how the block might be used, for every block, and the flowgraphs will live in the git repo.

Source Files

C++ files
Header files
Public header files
Block definition