Plots x,y1,y2,y3,y4 together (max. of 4 plots possible).
BAD_SIGNAL : Called with a dissociated pointer
interface
integer function gnuplot_plot2d(ptr_gctrl,n,x,y1,y1title,&
y1axis,y2,y2title,y2axis,y3,y3title,y3axis,y4,y4title,y4axis) &
result(status)
type(gnuplot_ctrl), pointer :: ptr_gctrl
real(dp), dimension(:), intent(in) :: x,y1
real(dp), dimension(:), intent(in), optional :: y2,y3,y4
integer(i4b), intent(in) :: n
character(len=*), intent(in), optional :: y1title,y2title,&
y3title,y4title
character(len=*), intent(in), optional :: y1axis,y2axis,&
y3axis,y4axis
end function gnuplot_plot2d
end interface
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