gnuplot-qt - 5.2.6+dfsg1-1+deb10u1 main

Gnuplot is a portable command-line driven interactive data and function
plotting utility that supports lots of output formats, including drivers
for many printers, (La)TeX, (x)fig, Postscript, and so on.
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Data files and self-defined functions can be manipulated by the internal
C-like language. Can perform smoothing, spline-fitting, or nonlinear fits,
and can work with complex numbers.
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This package contains the terminal driver that enables gnuplot to plot
images interactively using Qt.
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The package provides gnuplot-x11 and gnuplot-nox terminals plus an
additional QT-terminal for output.