Ubuntu Manpage: CONRAN - draws a two dimensional contour map from irregularly distributed data. The

NAME

       CONRAN - draws a two dimensional contour map from irregularly distributed data.  The
       contour lines may be smoothed.

STATUS

       CONRAN is approaching obsolescence.  If you have available an interpolation package which
       can do a random to gridded interpolation equal to that built into the Conran_family, then
       we recommend that you grid your dataset and use the Conpack utility instead.  Refer to the
       conpack and conpack_params man pages as well as the NCAR Graphics Contouring and Mapping
       Tutorial.

UTILITY

       This routine is part of the Conran_family in NCAR Graphics.  To see the overview man page
       for this utility, type "man conran_family".

SYNOPSIS

       CONRAN (XD,YD,ZD,NDP,WK,IWK,SCRARR)

DESCRIPTION

XD Input, real array -- of dimension NDP containing the X coordinates of the data
points.

YD Input, real array -- of dimension NDP containing the Y coordinates of the data
points.

ZD Input, real array -- of dimension NDP containing the data values at the
points.

NDP Input, integer -- is the number of data points to be contoured. NDP must be 4
or larger.

WK Input, real array -- workspace of dimension 15*NDP.

IWK Input, integer array -- workspace which must be dimensioned at least
IWK((27+NCP)*NDP).

The parameter NCP controls the number of data points to be used in the
interpolation. Increasing NCP causes more of the surrounding data to
influence the point of interpolation. In the case of linear interpolation NCP
is always 4. In the case of C1 interpolation, NCP can vary from 2 to 25 with
4 as the default.

The interpolation option is selected using parameter ITP. See the
conran_family_params man page for a description of all internal parameters.

SCRARR Real work array of dimension at least (RESOLUTION**2) where RESOLUTION is 40
by default.

Alternate resolutions are set using parameter SSZ. See the
conran_family_params man page.

USAGE

       The contours will be drawn as smoothed dashed or solid lines using splines under tension.
       There may be characters along the lines.  Many other options are available through the use
       of internal parameters.  See the conran_family_params man page.

       Quick and super versions of the Conran_family are also available through entries CONRAQ
       and CONRAS, respectively.

EXAMPLES

       Use the ncargex command to see the relevant example tconan.

ACCESS

       CONRAN can be invoked in two different ways.  The standard version produces contour plots
       which connect interpolated values on the boundary of the interpolation triangles.  The
       smooth version produces contours which are smoothed using splines under tension.

       To use standard CONRAN, load the NCAR Graphics libraries ncarg, ncarg_gks, and ncarg_c,
       preferably in that order.  To run the smooth option an additional library, dashsmth is
       needed.  It can be loaded by the user directly, along with the above three standard
       libraries, or loaded implicitly through the use of the -smooth option of the ncargf77
       command.  To run a code called mycode.f which has one or more calls to entry CONRAN, issue
       one of the commands:

       NORMAL    Command: "ncargf77 mycode.f"

                 The contours will be drawn as unsmoothed dashed or solid lines that can include
                 characters along the lines.

       SMOOTH    Command: "ncargf77 -smooth mycode.f"

                 The contours will be drawn as smoothed dashed or solid lines that can include
                 characters along the lines.

MESSAGES

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

COPYRIGHT

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