Open a pipe to a gnuplot process for visualization of images and control values.
::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 because gnuplot for Windows (wgnuplot) cannot be controlled by an external process.
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GnuplotFileID (output_control) |
gnuplot_id -> long * |
| Identifier for the gnuplot output stream. | |
::gnuplot_open_pipe returns the value H_MSG_TRUE if the sub-process could be created. Otherwise, an exception handling is raised.
::gnuplot_plot_image, ::gnuplot_plot_ctrl, ::gnuplot_close
System
