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

DESCRIPTION:

    This function is used in example 21. 

SYNOPSIS:

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

ARGUMENTS:

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

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

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

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

    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.) 
        40: same as 0 except date / time x labels.    
        41: same as 1 except date / time x labels.    
        42: same as 2 except date / time x labels.    
        43: same as 3 except date / time x labels.    
        50: same as 0 except date / time y labels.    
        51: same as 1 except date / time y labels.    
        52: same as 2 except date / time y labels. 
        53: same as 3 except date / time y labels.    
        60: same as 0 except date / time x and y labels.  
        61: same as 1 except date / time x and y labels.  
        62: same as 2 except date / time x and y labels.  
        63: same as 3 except date / time x and y labels. 
        70: same as 0 except custom x and y labels. 
        71: same as 1 except custom x and y labels. 
        72: same as 2 except custom x and y labels. 
        73: same as 3 except custom x and y labels. 
