gnuplot_open_pipe — Open a pipe to a gnuplot process for visualization of images and control values.
gnuplot_open_pipe( : : : GnuplotFileID)
gnuplot_open_pipe opens a pipe to a gnuplot sub-process with which subsequently images can be visualized as 3D-plots (gnuplot_plot_image) or control values can be visualized as 2D-plots (gnuplot_plot_ctrl). The sub-process must be terminated after displaying the last plot by calling gnuplot_close. The corresponding identifier for the gnuplot output stream is returned in GnuplotFileID.
gnuplot_open_pipe is only implemented for Unix-like systems because gnuplot for Windows (wgnuplot) cannot be controlled by an external process.
This operator returns a handle. Note that the state of an instance of this handle type may be changed by specific operators even though the handle is used as an input parameter by those operators.
Identifier for the gnuplot output stream.
gnuplot_open_pipe returns the value 2 (H_MSG_TRUE) if the sub-process could be created. Otherwise, an exception is raised.
gnuplot_plot_image, gnuplot_plot_ctrl, gnuplot_close