NAME

       HSTOPL - Turns options off and on for the Histogram utility.

SYNOPSIS

       CALL HSTOPL (STRING)

C-BINDING SYNOPSIS

       #include <ncarg/ncargC.h>

       void c_hstopl (char *string)

DESCRIPTION

       STRING      Character, input -- Selects an internal parameter.  The possibilities are:

                      ´HOR=ON´ or ´HOR=OFF´
                      ´PER=ON´ or ´PER=OFF´
                      ´MID=ON´ or ´MID=OFF´
                      ´SHA=ON´ or ´SHA=OFF´
                      ´DRL=ON´ or ´DRL=OFF´
                      ´MED=ON´ or ´MED=OFF´
                      ´NMV=ON´ or ´NMV=OFF´
                      ´PMV=ON´ or ´PMV=OFF´
                      ´PRM=ON´ or ´PRM=OFF´
                      ´FRA=ON´ or ´FRA=OFF´
                      ´LIS=ON´ or ´LIS=OFF´
                      ´DEF=ON´ or ´DEF=OFF´

                   The following options are defined by this subroutine:

                   HOR     The histogram bars are drawn horizontally if ´HOR=ON´, vertically if
                           ´HOR=OFF´.  The default is ´HOR=OFF´.

                   PER     If ´PER=ON´, a labeled percent axis is drawn on the right side of the
                           histogram (top if ´HOR=ON´.)  If ´PER=OFF´, no percent axis is drawn.
                           The default is ´PER=ON´.

                           This places a second axis on the opposite side of the frame from the
                           normal frequency axis.

                   MID     If ´MID=ON´, class labels are placed at the midpoint of each class
                           interval. If ´MID=OFF´, the class interval end points are labeled.
                           (MID defaults to ON if IFLAG = 2 or 3.)  The default is ´MID=ON´.

                   SHA     If ´SHA=ON´, the histogram bars are shaded.  If ´SHA=OFF´, the bars
                           are not shaded.  The default is ´SHA=ON´.

                           Devices will vary as to how they interpret shading.

                   DRL     If ´DRL=ON´, lines are drawn through the histogram bars where Y-axis
                           tick marks would occur.  When comparing two datasets (IFLAG=3), lines
                           are only drawn through the bars associated with the first dataset.  If
                           ´DRL=OFF´, no lines are drawn.  The default is ´DRL=OFF´.

                   MED     If ´MED=ON´, a line is drawn through the median value of all points.
                           If ´MED=OFF´, this line is not drawn. MED does not apply when
                           assigning Y-values to X-values; it is valid only for IFLAG = 1 or 2.
                           The default is ´MED=OFF´.

                   NMV     If ´NMV=ON´, histogram bar percentages will be calculated with respect
                           to the number of input data values (NPTS) minus the number of detected
                           missing values (MISS), or NMVA = NPTS - MISS.  If ´NMV=OFF´, histogram
                           bar percentages will be normalized to NPTS.

                   PMV     If ´PMV=ON´, missing value counts will be written on the plot.  If
                           ´NMV=OFF´, they will not.

                   PRM     If ´PRM=ON´, a perimeter is drawn around the histogram.  If ´PRM=OFF´,
                           no perimeter is drawn.  The default is ´PRM=OFF´.

                   FRA     If ´FRA=ON´, the frame is advanced automatically after the histogram
                           is drawn.  If  ´FRA=OFF´, the frame is not advanced, and the user must
                           call FRAME.  The default is ´FRA=ON´.

                   LIS     If ´LIS=ON´, all the options along with their values are printed on
                           the standard output. If ´LIS=OFF´, nothing is printed on the standard
                           output.  The default is ´LIS=OFF´.

                   DEF     If ´DEF=ON´, ALL the options are reset to their default values.
                           ´DEF=OFF´ has no effect.  All parameters begin at their default
                           values.

C-BINDING DESCRIPTION

       The C-binding argument descriptions are the same as the FORTRAN argument descriptions.

USAGE

       HSTOPL is called to toggle histogram options before entry HISTGR is called to generate the
       histogram.

EXAMPLES

       Use the command "ncargex thstgr" to generate a three frame example of various types of
       histograms.  "ncargex thstmv" will show three examples of histograms with missing values
       in the input data.

ACCESS

       To use HSTOPL or c_hstopl, load the NCAR Graphics libraries ncarg, ncarg_gks, and ncarg_c,
       preferably in that order.

MESSAGES

       See the histogram man page for a description of all Histogram error messages and/or
       informational messages.

SEE ALSO

       Online: histogram, histogram_params, histgr, hstopc, hstopi, hstopr, ncarg_cbind

       Hardcopy: NCAR Graphics Fundamentals, UNIX Version

COPYRIGHT

       Copyright (C) 1987-2009
       University Corporation for Atmospheric Research
       The use of this Software is governed by a License Agreement.