if you are using packaged versions you can use your distribution usual way, for example is debian
sudo apt-get remove PACKAGE_NAME
PACKAGE_NAME being one or more of the following (only string before dash)
libcsiro0 - Scientific plotting library
libplplot-c++9c2 - Scientific plotting library
libplplot-dev - Scientific plotting library (development files)
libplplot-fortran9 - Scientific plotting library
libplplot9 - Scientific plotting library
octave-plplot - Octave support for PLplot, a plotting library
plplot-bin - Scientific plotting library (utilities)
plplot-doc - Documentation for PLplot, a plotting library
plplot-tcl - Tcl/Tk support for PLplot, a plotting library
plplot-tcl-dev - Tcl/Tk development support for PLplot, a plotting library
plplot9-driver-gd - Scientific plotting library (GD driver)
plplot9-driver-gnome2 - Scientific plotting library (Gnome Canvas Widget driver)
plplot9-driver-psttf - Scientific plotting library (PostScript with Unicode support)
plplot9-driver-wxwidgets - Scientific plotting library (wxWidgets driver)
plplot9-driver-xwin - Scientific plotting library (X11 driver)
python-plplot - Python support for PLplot, a plotting library
On the other hand, if you installed it by hand compiling it, you can use "sudo make clean".
Hope it helps.
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how can I uninstall plplot
I can only speak for linux...
if you are using packaged versions you can use your distribution usual way, for example is debian
sudo apt-get remove PACKAGE_NAME
PACKAGE_NAME being one or more of the following (only string before dash)
libcsiro0 - Scientific plotting library
libplplot-c++9c2 - Scientific plotting library
libplplot-dev - Scientific plotting library (development files)
libplplot-fortran9 - Scientific plotting library
libplplot9 - Scientific plotting library
octave-plplot - Octave support for PLplot, a plotting library
plplot-bin - Scientific plotting library (utilities)
plplot-doc - Documentation for PLplot, a plotting library
plplot-tcl - Tcl/Tk support for PLplot, a plotting library
plplot-tcl-dev - Tcl/Tk development support for PLplot, a plotting library
plplot9-driver-gd - Scientific plotting library (GD driver)
plplot9-driver-gnome2 - Scientific plotting library (Gnome Canvas Widget driver)
plplot9-driver-psttf - Scientific plotting library (PostScript with Unicode support)
plplot9-driver-wxwidgets - Scientific plotting library (wxWidgets driver)
plplot9-driver-xwin - Scientific plotting library (X11 driver)
python-plplot - Python support for PLplot, a plotting library
On the other hand, if you installed it by hand compiling it, you can use "sudo make clean".
Hope it helps.