Input Instructions for PLOTR

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     *                                                                *
     *  card 0                                                        *
     *     nplt          unit for output plot commands                *
     *     nplt0         unit for input plot commands                 *
     *                     default=0=none                             *
     *                     output plot commands are appended          *
     *                     to the input plot commands, if any.        *
     *  card 1                                                        *
     *     lori          page orientation (def=1)                     *
     *                    0  portrait (7.5x10in)                      *
     *                    1  landscape (10x7.5in)                     *
     *     istyle        character style (def=2)                      *
     *                     1 = roman                                  *
     *                     2 = swiss                                  *
     *     size          character size option                        *
     *                     pos = height in page units                 *
     *                     neg = height as fraction of subplot size   *
     *                     (default=0.30)                             *
     *     ipcol         page color (def=white)                       *
     *                    0=white                                     *
     *                    1=navajo white                              *
     *                    2=blanched almond                           *
     *                    3=antique white                             *
     *                    4=very pale yellow                          *
     *                    5=very pale rose                            *
     *                    6=very pale green                           *
     *                    7=very pale blue                            *
     *                                                                *
     * -----repeat cards 2 through 13 for each curve-----             *
     *                                                                *
     *  card 2                                                        *
     *     iplot         plot index                                   *
     *                     99 = terminate plotting job                *
     *                      1 = new axes, new page                    *
     *                     -1 = new axes, existing page               *
     *                      n = nth additional plot on existing axes  *
     *                     -n = start a new set of curves using       *
     *                          the alternate y axis                  *
     *                     default = 1                                *
     *     iwcol         window color (def=white)                     *
     *                    color list same as for ipcol above          *
     *     factx         factor for energies (default=1.)             *
     *     facty         factor for cross-sections (default=1.)       *
     *     xll,yll       lower-left corner of plot area               *
     *     ww,wh,wr      window width, height, and rotation angle     *
     *                   (plot area defaults to one plot per page)    *
     *                                                                *
     * -----cards 3 thru 7 for iplot = 1 or -1 only-----              *
     *                                                                *
     *  card 3                                                        *
     *     t1            first line of title                          *
     *                   60 characters allowed.                       *
     *                   default=none                                 *
     *                                                                *
     *  card 3a                                                       *
     *     t2            second line of title                         *
     *                   60 characters allowed.                       *
     *                   default=none                                 *
     *                                                                *
     *  card 4                                                        *
     *     itype         type for primary axes                        *
     *                     1 = linear x - linear y                    *
     *                     2 = linear x - log y                       *
     *                     3 = log x - linear y                       *
     *                     4 = log x - log y                          *
     *                     set negative for 3d axes                   *
     *                     default=4                                  *
     *     jtype         type for alternate y axis or z axis          *
     *                     0 = none                                   *
     *                     1 = linear                                 *
     *                     2 = log                                    *
     *                     default=0                                  *
     *     igrid         grid and tic mark control                    *
     *                     0 = no grid lines or tic marks             *
     *                     1 = grid lines                             *
     *                     2 = tic marks on outside                   *
     *                     3 = tic marks on inside                    *
     *                     default=2                                  *
     *     ileg          option to write a legend.                    *
     *                     0 = none                                   *
     *                     1 = write a legend block with upper left   *
     *                         corner at xtag,ytag (see below)        *
     *                     2 = use tag labels on each curve with      *
     *                         a vector from the tag to the curve     *
     *                     default=0                                  *
     *     xtag          x coordinate of upper left corner            *
     *                   of legend block                              *
     *     ytag          y coord of upper left corner                 *
     *                   default=upper left corner of plot            *
     *                                                                *
     *  card 5                                                        *
     *     el            lowest energy to be plotted                  *
     *     eh            highest energy to be plotted                 *
     *     xstep         x axis step                                  *
     *                   default = automatic scales                   *
     *                   (default all 3, or none)                     *
     *                   (the actual value of xstep is                *
     *                       ignored for log scales)                  *
     *                                                                *
     *  card 5a                                                       *
     *     xlabl         label for x axis                             *
     *                   60 characters allowed.                       *
     *                    default="energy (ev)"                       *
     *                                                                *
     *  card 6                                                        *
     *     yl            lowest value of y axis.                      *
     *     yh            highest value of y axis.                     *
     *     ystep         step for y ayis (linear scales only)         *
     *                   default = automatic scales                   *
     *                   (default all 3, or none)                     *
     *                   (the actual value of ystep is                *
     *                       ignored for log scales)                  *
     *                                                                *
     *  card 6a                                                       *
     *     ylabl         label for y axis                             *
     *                   60 characters allowed.                       *
     *                    default="cross section (barns)"             *
     *                                                                *
     *  card 7   (jtype.gt.0 only)                                    *
     *     rbot          lowest value of secondary y axis or z axis   *
     *     rtop          highest value of secondary y axis or z axis  *
     *     rstep         step for secondary y axis or z axis          *
     *                   default for last three = automatic           *
     *                                                                *
     *  card 7a  (jtype.gt.0 only)                                    *
     *     rl            label for alternate y axis or z axis         *
     *                   60 characters allowed.                       *
     *                   default=blank                                *
     *                                                                *
     *  -----cards 8 thru 9 are always given-----                     *
     *                                                                *
     *  card 8                                                        *
     *     iverf         version of endf tape                         *
     *                     set to zero for data on input file         *
     *                       and ignore rest of parameters on card    *
     *                     set to 1 for gendf data                    *
     *     nin           input tape                                   *
     *                   can change for every curve if desired.       *
     *     matd          desired material                             *
     *     mfd           desired file                                 *
     *     mtd           desired section                              *
     *                    mtd=0 means loop over all reactions in mfd  *
     *                    (usually one page per mt, but for mf=3,     *
     *                    resonance reactions may have several pages) *
     *     temper        temperature for endf/b data (k)              *
     *                   default=0.                                   *
     *     nth,ntp,nkh   see below (defaults=1)                       *
     *                                                                *
     *       special meanings for nth,ntp,nkh for file 3 or 5 data    *
     *            nth   number of subsection to plot                  *
     *              (works for isomer prod, delayed n, etc.)          *
     *            ntp   not used                                      *
     *            nkh   not used                                      *
     *                                                                *
     *       special meanings for nth,ntp,nkh for file 6 data         *
     *            nth   index for  incident energy                    *
     *            ntp   number of dep. variable in cyle to plot       *
     *                  (or angle number for law 7)                   *
     *            nkh   number of outgoing particle to plot           *
     *                                                                *
     *       special meanings for nth,ntp,nkh for gendf mf=3 data     *
     *            nth=0 for flux per unit lethargy                    *
     *            nth=1 for cross section (default)                   *
     *            ntp=1 for infinite dilution (default)               *
     *            ntp=2 for next lowest sigma-zero values, etc.       *
     *            nkh=1 for p0 weighting (default)                    *
     *            nkh=2 for p1 weighting (total only)                 *

     *       special meaning for nth for gendf mf=6 data              *
     *            nth=1 plot 2-d spectrum for group 1                 *
     *            nth=2 plot 2-d spectrum for group 2                 *
     *              etc.                                              *
     *        no special flags are needed for mf=6 3d plots           *
     *                                                                *
     *      special meanings for nth and ntp for mf7 plots            *
     *           nth is index for indep. variable (alpha or beta)     *
     *           ntp=1 selects alpha as indep. variable (default)     *
     *           ntp=2 selects beta as indep. variable                *
     *           nkh=1 selects normal s(alpha,beta)                   *
     *           nkh=2 selects script s(alpha,-beta)                  *
     *           nkh=3 selects script s(alpha,beta)                   *
     *                                                                *
     * -----cards 9 and 10 for 2d plots only-----                     *
     *                                                                *
     *  card 9                                                        *
     *     icon          symbol and connection option                 *
     *                     0 = points connected, no symbols           *
     *                    -i = points not connected, symbol at every  *
     *                         ith point                              *
     *                     i = points connected, symbol at every ith  *
     *                         points                                 *
     *                     default=0                                  *
     *     isym          no. of symbol to be used                     *
     *                     0 = square                                 *
     *                     1 = octagon                                *
     *                     2 = triangle                               *
     *                     3 = cross                                  *
     *                     4 = ex                                     *
     *                     5 = diamond                                *
     *                     6 = inverted triangle                      *
     *                     7 = exed square                            *
     *                     8 = crossed ex                             *
     *                     9 = crossed diamond                        *
     *                     10 = crossed octagon                       *
     *                     11 = double triangle                       *
     *                     12 = crossed square                        *
     *                     13 = exed octagon                          *
     *                     14 = triangle and square                   *
     *                     15 = filled circle                         *
     *                     16 = open circle                           *
     *                     17 = open square                           *
     *                     18 = filled square                         *
     *                     default=0                                  *
     *     idash         type of line to plot                         *
     *                     0 = solid                                  *
     *                     1 = dashed                                 *
     *                     2 = chain dash                             *
     *                     3 = chain dot                              *
     *                     4 = dot                                    *
     *                     default=0                                  *
     *     iccol         curve color (def=black)                      *
     *                     0=black                                    *
     *                     1=red                                      *
     *                     2=green                                    *
     *                     3=blue                                     *
     *                     4=magenta                                  *
     *                     5=cyan                                     *
     *                     6=brown                                    *
     *                     7=purple                                   *
     *     ithick        thickness of curve (def=1)                   *
     *                     0 = invisible (for shaded areas)           *
     *     ishade        shade pattern                                *
     *                     0 = none                                   *
     *                     1 to 10 = 10% to 100% gray                 *
     *                     11 to 20 = 45 deg right hatching           *
     *                     21 to 30 = 45 deg left hatching            *
     *                     31 to 40 = 45 deg cross hatching           *
     *                     41 to 50 = shades of green                 *
     *                     51 to 60 = shades of red                   *
     *                     61 to 70 = shades of brown                 *
     *                     71 to 80 = shades of blue                  *
     *                     default=0                                  *
     *                                                                *
     *  card 10  ---ileg.ne.0 only---                                 *
     *     aleg          title for curve tag or legend block          *
     *                   60 characters allowed.                       *
     *                   default=blank                                *
     *                                                                *
     *  card 10a  ---ileg.eq.2 only---                                *
     *     xtag          x position of tag title                      *
     *     ytag          y position of tag title                      *
     *     xpoint        x coordinate of vector point                 *
     *                    (.le.0 to omit vector)                      *
     *                                                                *
     * -----card 11 for 3d plots only-----                            *
     *                                                                *
     *  card 11                                                       *
     *     xv,yv,zv      abs. coords of view point                    *
     *                   defaults=15.,-15.,15.                        *
     *     x3,y3,z3      abs. sides of work box volume                *
     *                   defaults=2.5,6.5,2.5                         *
     *                                                                *
     *         set x3 or y3 negative to flip the order of the         *
     *         axis on that side of the work box.                     *
     *                                                                *
     *  -----cards 12 thru 13 for iverf = 0 only-----                 *
     *                                                                *
     *  card 12                                                       *
     *     nform          format code for input data                  *
     *                    0 = free format input with                  *
     *                    optional x and y error bars                 *
     *                                                                *
     *  card 13   ---nform = 0 only---                                *
     *     xdata          dependent value                             *
     *                    terminate with empty card (/)               *
     *     ydata          independent value                           *
     *     yerr1          lower y error limit                         *
     *                    no y error bar if zero                      *
     *     yerr2          upper y error limit                         *
     *                    if zero, equals yerr1                       *
     *     xerr1          x left error limit                          *
     *                    no x error bar if zero                      *
     *     xerr2          x right error limit                         *
     *                    if zero, equals xerr1                       *
     *                                                                *
     *                                                                *
     * all curves contain at least 10 points per decade (see delta).  *
     * code can plot curves containing fewer than 2000 points (see    *
     * max) without thinning.  curves with more points are thinned    *
     * based on a minimum spacing determined from max and the         *
     * length of the x axis.                                          *
     *                                                                *
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