NAME

       HALFAX - Draws orthogonal axes intersecting at a specified point and with a specified set
       of labels.

SYNOPSIS

       CALL HALFAX (MJRX,MNRX,MJRY,MNRY,XINT,YINT,IXLB,IYLB)

C-BINDING SYNOPSIS

       #include <ncarg/ncargC.h>

       void c_halfax (int mjrx, int mnrx, int mjry, int mnry,
       float xint, float yint, int ixlb, int iylb)

DESCRIPTION

       MJRX, MNRX, MJRY, and MNRY
                   (input expressions of type INTEGER) specify the major and minor divisions of
                   the horizontal (X) and vertical (Y) axes of the current viewport. The meanings
                   of these parameters depend on the current setting of the internal parameter
                   ´LS´ of SPPS:

                   •      If the value of ´LS´ implies that the axis is linear: MJRX(Y) specifies
                          the number of major divisions of the X(Y) axis and MNRX(Y) specifies
                          the number of minor divisions within each major division. In each case,
                          the value specifies the number of spaces between grid lines or ticks
                          rather than the number of lines or ticks. Including the ones at the
                          ends of the axes, there is always one more major division line or mark
                          than the number of major divisions specified by MJRX(Y). Similarly,
                          there is always one less minor division line or tick per major division
                          than the number of minor divisions per major division specified by
                          MNRX(Y).

                   •      If the value of ´LS´ implies that the axis is logarithmic: Each major
                          division point occurs at a value 10**MJRX(Y) times the previous point.
                          For example, if the minimum X-axis value were 3., the maximum X-axis
                          value 3000. and MJRX 1, then the major division points would be 3.,
                          30., 300., and 3000. If MNRX(Y).LE.10, there are nine minor divisions
                          within each major division. For example, between 3. and 30., there
                          would be minor division points at 6., 9., 12., .  . . 27. If
                          MNRX(Y).GT.10., minor divisions are omitted.

       XINT and YINT
                   (input expressions of type REAL) are the user coordinates of the point of
                   intersection of the two axes.

       IXLB        (an input expression of type INTEGER) is defined as follows:

                   •      IXLB = -1 implies that no X axis is to be drawn.

                   •      IXLB = 0 implies that the X axis is to be drawn unlabeled.

                   •      IXLB = 1 implies that the X axis is to be drawn and labeled.

       IYLB        (an input expression of type INTEGER) is defined as follows:

                   •      IYLB = -1 implies that no Y axis is to be drawn.

                   •      IYLB = 0 implies that the Y axis is to be drawn unlabeled.

                   •      IYLB = 1 implies that the Y axis is to be drawn and labeled.

C-BINDING DESCRIPTION

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

USAGE

       The statement

          CALL HALFAX (MJRX,MNRX,MJRY,MNRY,XINT,YINT,IXLB,IYLB)

       is equivalent to

          CALL GRIDAL (MJRX,MNRX,MJRY,MNRY,IXLB,IYLB,10,XINT,YINT)

EXAMPLES

       Use the ncargex command to see the following relevant example: tgrida.

ACCESS

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

SEE ALSO

       Online: gridall, gacolr, gagetc, gageti, gagetr, gasetc, gaseti, gasetr, grid, gridal,
       gridl, labmod, perim, periml, tick4, ticks, 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.