VectorPlot example 4

How to rotate a VectorPlot 90 degrees while preserving the original relationship of the data elements

This VectorPlot example can be created using HLU function calls or NCL. It demonstrates how to rotate a VectorPlot 90 degrees while preserving the original relationship of the data elements. The names of the source files for this example are vc04c.c, vc04f.f, and vc04n.ncl.

Discussion

This module discusses how to create this plot using NCL or HLU C or FORTRAN calls. A resource file is included with this example, and it is called vc04.res. This file is used to change the default resource settings for the plot. Some of the VectorPlot line resources are tweaked in the resource file to show how to change the appearance of the vectors.

A detailed discussion of how this example works appears in its source code.

Creating the plot using HLUs

The HLU C program that generates this plot is called vc04c.c.

Creating the plot using HLU FORTRAN library calls

The HLU FORTRAN program that generates this plot is called vc04f.f.

Creating the plot using NCL

The NCL script that generates this plot is called vc04n.ncl.

The data

The data for this plot are from an ASCII file called "uvdata0.asc".

The data file is located in your NCAR Graphics data directory in a subdirectory called "asc". You can get the name of the data directory by typing "ncargpath data" at your shell prompt.

How to run this example

This example can be created using a C program (vc04c.c), a FORTRAN program (vc04f.f), or an NCL script (vc04n.ncl). The example is installed in the following locations:

The resource file for this example is located in:

The ASCII data file is installed in the following location:

You can copy this example and run it by typing "ng4ex vc04c", "ng4ex vc04f", or "ng4ex vc04n". A copy of the source file and resource file will be placed in your current working directory. The source code will be automatically compiled, linked, and run for you.

Quick Start Guide Control Panel

NG4.1 Home, Index, Examples, Glossary, Feedback, QSG Contents, QSG WhereAmI?

$Revision: 1.7 $ $Date: 1999/03/23 21:07:08 $