ncl_vector man page
VECTOR — generates a "pen-down" move to a specified point in the user coordinate system. VECTOR is used in conjunction with the routine FRSTPT to draw lines.
CALL VECTOR (PX,PY)
void c_vector (float px, float py)
(an input expression of type REAL) defines the X user coordinate.
(an input expression of type REAL) defines the Y user coordinate.
The C-binding argument descriptions are the same as the FORTRAN argument descriptions.
Polyline type, line width, and color can be set by calling the GKS routines GSLN, GSLWSC, GSCR, and GSPLCI before calling VECTOR.
Note that, for the sake of efficiency, the routines FRSTPT and VECTOR buffer the polylines resulting from pen moves. One must be sure to flush the SPPS polyline buffer before changing polyline attributes. A "CALL PLOTIF (0.,0.,2)" will flush the buffer.
Use the ncargex command to see the following relevant examples: tgflas.
To use VECTOR or c_vector, load the NCAR Graphics libraries ncarg, ncarg_gks, and ncarg_c, preferably in that order.
Online: gpl, gsln, gslwsc, gscr, gsplci, spps, spps_params, frstpt, line, curve, ncarg_cbind
Hardcopy: NCAR Graphics Fundamentals, UNIX Version; User's Guide for NCAR GKS-0A Graphics
Copyright (C) 1987-2009
University Corporation for Atmospheric Research
The use of this Software is governed by a License Agreement.