
plenv0: Same as plenv() but if in multiplot mode does not advance the subpage, instead clears it. 

DESCRIPTION:

	Sets up plotter environment for simple graphs by calling pladv and
	setting up viewport and window to sensible default values.	plenv0
	leaves enough room around most graphs for axis labels and a title.
	When these defaults are not suitable, use the individual routines
	plvpas, plvpor, or plvasp for setting up the viewport, plwind for
	defining the window, and plbox for drawing the box. 

SYNOPSIS:

plenv0(xmin, xmax, ymin, ymax, just, axis)

ARGUMENTS:

    xmin (PLFLT, input) :     Value of x at left-hand edge of window. 

    xmax (PLFLT, input) :     Value of x at right-hand edge of window. 

    ymin (PLFLT, input) :     Value of y at bottom edge of window. 

    ymax (PLFLT, input) :     Value of y at top edge of window. 

    just (PLINT, input) :     Controls how the axes will be scaled: -1: the
        scales will not be set, the user must set up the scale before
        calling plenv0() using plsvpa(), plvasp() or other. 
            0: the x and y axes are scaled independently to use as much of
            the screen as possible. 
            1: the scales of the x and y axes are made equal. 
            2: the axis of the x and y axes are made equal, and the plot
            box will be square. 


    axis (PLINT, input) :     Controls drawing of the box around the plot:
        -2: draw no box, no tick marks, no
    numeric tick labels, no axes. 
            -1: draw box only. 
            0: draw box, ticks, and numeric tick labels. 
            1: also draw coordinate axes at x=0 and y=0. 
            2: also draw a grid at major tick
    positions in both coordinates. 
            3: also draw a grid at minor tick
    positions in both coordinates. 
            10: same as 0 except logarithmic x tick marks. (The x data
            have to be converted to logarithms separately.) 
            11: same as 1 except logarithmic x tick marks. (The x data
            have to be converted to logarithms separately.) 
            12: same as 2 except logarithmic x tick marks. (The x data
            have to be converted to logarithms separately.) 
            13: same as 3 except logarithmic x tick marks. (The x data
            have to be converted to logarithms separately.) 
            20: same as 0 except logarithmic y tick marks. (The y data
            have to be converted to logarithms separately.) 
            21: same as 1 except logarithmic y tick marks. (The y data
            have to be converted to logarithms separately.) 
            22: same as 2 except logarithmic y tick marks. (The y data
            have to be converted to logarithms separately.) 
            23: same as 3 except logarithmic y tick marks. (The y data
            have to be converted to logarithms separately.) 
            30: same as 0 except logarithmic x and y tick marks. (The x
            and y data have to be converted to logarithms separately.) 
            31: same as 1 except logarithmic x and y tick marks. (The x
            and y data have to be converted to logarithms separately.) 
            32: same as 2 except logarithmic x and y tick marks. (The x
            and y data have to be converted to logarithms separately.) 
            33: same as 3 except logarithmic x and y tick marks. (The x
            and y data have to be converted to logarithms separately.) 
