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Data Types

The basic types used for the integers, reals and complex numbers are defined as :

     integer, parameter :: i4b = SELECTED_INT_KIND(9)
     integer, parameter :: dp =  KIND(1.0d0)
     

The fundamental data type used to control the gnuplot session is a derived type named gnuplot_ctrl. Unless you are using a super-canned routine, you must define a pointer to this type, and invoke the gnuplot session using gnuplot_init :

     ptr_gctrl=gnuplot_init(argument)
     

where argument is the X option you wish to use with gnuplot_initgnuplot-init. Then use this pointer in the function invocations that follow.