1HALFAX(3NCARG)                   NCAR GRAPHICS                  HALFAX(3NCARG)
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NAME

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

10       CALL HALFAX (MJRX,MNRX,MJRY,MNRY,XINT,YINT,IXLB,IYLB)
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C-BINDING SYNOPSIS

13       #include <ncarg/ncargC.h>
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15       void c_halfax (int mjrx, int mnrx, int mjry, int mnry,
16       float xint, float yint, int ixlb, int iylb)
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DESCRIPTION

19       MJRX, MNRX, MJRY, and MNRY
20                   (input expressions of type INTEGER) specify the major and
21                   minor divisions of the horizontal (X) and vertical (Y) axes
22                   of the current viewport. The meanings of these parameters
23                   depend on the current setting of the internal parameter
24                   ´LS´ of SPPS:
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26                   ·      If the value of ´LS´ implies that the axis is
27                          linear: MJRX(Y) specifies the number of major
28                          divisions of the X(Y) axis and MNRX(Y) specifies the
29                          number of minor divisions within each major
30                          division. In each case, the value specifies the
31                          number of spaces between grid lines or ticks rather
32                          than the number of lines or ticks. Including the
33                          ones at the ends of the axes, there is always one
34                          more major division line or mark than the number of
35                          major divisions specified by MJRX(Y). Similarly,
36                          there is always one less minor division line or tick
37                          per major division than the number of minor
38                          divisions per major division specified by MNRX(Y).
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40                   ·      If the value of ´LS´ implies that the axis is
41                          logarithmic: Each major division point occurs at a
42                          value 10**MJRX(Y) times the previous point. For
43                          example, if the minimum X-axis value were 3., the
44                          maximum X-axis value 3000. and MJRX 1, then the
45                          major division points would be 3., 30., 300., and
46                          3000. If MNRX(Y).LE.10, there are nine minor
47                          divisions within each major division. For example,
48                          between 3. and 30., there would be minor division
49                          points at 6., 9., 12., .  . . 27. If MNRX(Y).GT.10.,
50                          minor divisions are omitted.
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52       XINT and YINT
53                   (input expressions of type REAL) are the user coordinates
54                   of the point of intersection of the two axes.
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56       IXLB        (an input expression of type INTEGER) is defined as
57                   follows:
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59                   ·      IXLB = -1 implies that no X axis is to be drawn.
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61                   ·      IXLB = 0 implies that the X axis is to be drawn
62                          unlabeled.
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64                   ·      IXLB = 1 implies that the X axis is to be drawn and
65                          labeled.
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67       IYLB        (an input expression of type INTEGER) is defined as
68                   follows:
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70                   ·      IYLB = -1 implies that no Y axis is to be drawn.
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72                   ·      IYLB = 0 implies that the Y axis is to be drawn
73                          unlabeled.
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75                   ·      IYLB = 1 implies that the Y axis is to be drawn and
76                          labeled.
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C-BINDING DESCRIPTION

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

83       The statement
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85          CALL HALFAX (MJRX,MNRX,MJRY,MNRY,XINT,YINT,IXLB,IYLB)
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87       is equivalent to
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89          CALL GRIDAL (MJRX,MNRX,MJRY,MNRY,IXLB,IYLB,10,XINT,YINT)
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EXAMPLES

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

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

99       Online: gridall, gacolr, gagetc, gageti, gagetr, gasetc, gaseti,
100       gasetr, grid, gridal, gridl, labmod, perim, periml, tick4, ticks,
101       ncarg_cbind.
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103       Hardcopy: NCAR Graphics Fundamentals, UNIX Version
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106       Copyright (C) 1987-2009
107       University Corporation for Atmospheric Research
108       The use of this Software is governed by a License Agreement.
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112UNIX                              March 1993                    HALFAX(3NCARG)
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