3 6       zerox zeroy         graph coordinate center
x 0 20    zx min max          (character, real, real) if zx='x' then set xaxis
y 0 20    zy min max          (character, real, real) if zy='y' then set yaxis
10 10 1 1 xinterval yinterval xsubintervals ysubintervals: axis intervals
6 6       xwidth    ywidth    width of numbers in characters
2 2       xdecimal  ydecimal  number of decimal places
15 15     xsize     ysize     size of axes in cm
Rtrue
Rsimulated
a         zc                  'c' crosshairs, axXyYnN
n 2       zxl base            if zxl='l' then make x axis log to the given base
n 2       zyl base            if zyl='l' then make y axis log to the given base
          *********************************************************************
2 3       xcolumn   ycolumn   columns of xyin that determine plot location
1         symbol column       the xyin column to read symbols from
0  0      xscolumn  yscolumn  columns of xyin that determine the symbol size
0 0 0     hue saturation brightness   columns for color manipulation
          *********************************************************************
c         symbol-to-plot      c(circle)bd(dotted box)x+Ifgpr(rectangle)
p         symbol-flag         character in xyin that indicates that this symbol
0.125     symbol sizex        side in cm on the x axis of the symbol.
0.125     symbol sizey        as for the x axis, get size from yscolumn
n         no connection (example for connection is c- 0.125 for dashed 0.125 cm)
n  0.125  linetype  size      linetype l.-in and size of dashes or dots
          *********************************************************************
p         symbol-to-plot      c(circle)bd(dotted box)x+Ifgpr(rectangle)
n         symbol-flag         character in xyin that indicates that this symbol
0.125     symbol sizex        side in cm on the x axis of the symbol.
0.125     symbol sizey        as for the x axis, get size from yscolumn
n         no connection (example for connection is c- 0.125 for dashed 0.125 cm)
-  0.125  linetype  size      linetype l.-in and size of dashes or dots
          **** version = 2.00 of xyplop.rsim
.
          **** version 8.50 of xyplop: uses cm for distances
l 1 0 0.125  User defined line