ncl_aggetp (3) - Linux Man Pages
AGGETP - Allows a user program to get the values of a group of parameters containing one or more elements.
SYNOPSISCALL AGGETP (TPGN,FURA,LURA)
C-BINDING SYNOPSIS#include <ncarg/ncargC.h>
(an input expression of type CHARACTER) is a character
string of the form 'k1/k2/ . . . kn.', where each of the
ki's is a keyword. The keyword k1 specifies a group of
parameters, k2 a subgroup of that group, k3 a subgroup of
that subgroup, etc. The whole string is the name of some
group of parameters the user wishes to set.
For example, 'AXIS.' is the name of a 92-word group of parameters describing the four axes, 'AXIS/RIGHT.' is the name of a 23-word subgroup describing the right Y axis,
is the name of a 2-word further subgroup describing the intersection of the right Y axis with the bottom of the grid window, and
is the name of a single parameter specifying the point of intersection of the right Y axis with the bottom of the grid window as an X coordinate in the user coordinate system.
Obviously, these names can sometimes become rather long. There are various ways in which they may be shortened. First, since the fifth and following characters of each keyword are ignored, they may be omitted; this would shorten
Even fewer characters may be used, as long as no ambiguity of interpretation arises. To be completely safe, use at least the first three characters of the group keyword and at least the first two characters of each subgroup keyword; this would shorten the example above to 'AXI/RI/IN/US.'. Moreover, certain group and subgroup keywords may be omitted entirely; for example, 'AXI/RI/IN/US.' may be shortened to 'RI/IN/US.'. Keywords which may be entirely omitted are enclosed in brackets in the headings in the section "PARAMETERS".
Names may also be lengthened in various ways in order to improve their readability. Blanks may be used as desired on either side of a keyword. Any sequence of characters not including a slash or a period may be inserted after a keyword, separated from it by at least one blank. For example, the name
'DASH PATTERN / CHARACTER WIDTH .'
is equivalent to, and considerably more meaningful than,
'DAS/CH.' (or even 'DASH/CHARACTER.')
- (an input array of type REAL, dimensioned LURA) contains new values for the parameters in the group specified by TPGN, in the same order as they appear in the group. All parameters have real values (because of a portability problem which arose in implementing the routines AGSETF and AGSETR). Those which represent intrinsically integral quantities have a value of the form "FLOAT(n)", where "n" is the integral quantity being represented. Some parameters intrinsically take on character-string values; the real quantity stored as the value of such a parameter is typically an identifier allowing for later retrieval of the character string from a character storage area inside Autograph. The routines AGSETC and AGGETC may be used to set/get the character-string values of such parameters.
- (an input expression of type INTEGER) is the length of FURA. Its value may be less than, equal to, or greater than, the length of the group specified by TPGN. The number of values transferred into FURA is the minimum of the two (but not less than one). You may, for example, get the first two parameters of a 100-parameter group by using LURA = 2.
C-BINDING DESCRIPTIONThe C-binding argument description is the same as the FORTRAN argument description.
USAGEThis routine allows you to retrieve the current value of Autograph parameters. For a complete list of parameters available in this utility, see the autograph_params man page.
ACCESSTo use AGGETP or c_aggetp, load the NCAR Graphics libraries ncarg, ncarg_gks, and ncarg_c, preferably in that order. To get smoother curves, drawn using spline interpolation, also load libdashsmth.o. Or, you can use the ncargf77 command to compile your program and load the above libraries, then, to get smoother curves, use the -dashsmth option.
MESSAGESSee the autograph man page for a description of all Autograph error messages and/or informational messages.
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University Corporation for Atmospheric Research
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