ng4ex man page

ng4ex — NCAR Graphics High Level Utilities Example Programs

Synopsis

ng4ex  [-A] [-C] [-Fortran] [-NCL] [-cdf] [-csagrid] [-cssgrid] [-gui] [-anno] [-gsun] [-W workstation_type] [-app] [-basic] [-contourplot] [-fitgrid] [-labelbar] [-legend] [-primitives] [-mapplot] [-natgrid] [-ngmath] [-streamplot] [-shgrid] [-textitem] [-tickmark] [-title] [-vectorplot] [-xyplot] [-list] [-clean] [-n] name ...

Description

ng4ex provides the user with access to several C, Fortran, and NCL examples illustrating the use of the NCAR Graphics HLUs (High Level Utilities) and NCL.  Please note that NCL is not available for Cray systems.

ng4ex copies the source code for the specified example(s) into the current directory and then compiles, links, and executes the example (if it's a Fortran or C program) or runs NCL on it (if it's an NCL script file).  Depending on the example, the output may be sent to an NCGM (NCAR Graphics Metafile) file and/or displayed to an X window on your screen.  You must be running X and have your DISPLAY environment set correctly in order for the X window examples to execute properly.

If the requested example creates an NCGM file, it will have the same name as the example, suffixed with ".ncgm". An option allows you to request that only the source code be copied to your directory, without compiling or running the example.  Another option allows you to request that only the NCGM file be left in your directory and that all other files created by ng4ex be deleted. The argument name may be selected from the lists that appear below.

Options

-A

Generate all available examples.

-C

Generate all C examples.

-Fortran

Generate all Fortran examples.

-NCL

Generate all NCL examples.

-cdf

Generate all the examples that use netCDF files.  For the C and Fortran examples, this option requires that you have the netCDF library installed on your system.

-gui

Generate all GUI examples. This option requires that you have the Motif libraries on your system.

-anno

Generate all annotation examples.

-W

Specify the workstation type.  This argument can only be specified  as a string.  Some examples are meant to display to the X workstation, to an NCGM file, or to a PostScript file only, in which case this option may be ignored. You cannot specify more than one workstation type.  If you don't specify one, then a default one will be used. The following workstation_type strings are valid:

            ncgm

-  NCGM file

            x11

-  X11 window

            ps

-  PostScript file

            pdf

-  PDF file

-app

Generate all the app Fortran, C, and NCL examples that show how to do specific things with resources.

-basic

Generate all the basic Fortran, C, and NCL examples that relate to the basic examples discussed in the Quick Start Guide.

-contourplot

Generate all Fortran, C, and NCL ContourPlot examples.

-csagrid

Generate all NCL Csagrid examples.

-cssgrid

Generate all NCL Cssgrid examples.

-dsgrid

Generate all Fortran, C, and NCL Dsgrid examples.

-fitgrid

Generate all NCL Natgrid examples.

-labelbar

Generate all Fortran, C, and NCL Labelbar examples.

-legend

Generate all Fortran, C, and NCL Legend examples.

-natgrid

Generate all Fortran, C, and NCL Natgrid examples.

-primitives

Generate all Fortran, C, and NCL GraphicStyle examples.

-mapplot

Generate all Fortran, C, and NCL MapPlot examples.

-ngmath

Generate all Fortran, C, and NCL Ngmath examples.

-shgrid

Generate all NCL Shgrid examples.

-streamlineplot

Generate all Fortran, C, and NCL StreamlinePlot examples.

-textitem

Generate all Fortran, C, and NCL TextItem examples.

-tickmark

Generate all Fortran, C, and NCL TickMark examples.

-title

Generate all Fortran, C, and NCL Title examples.

-vectorplot

Generate all Fortran, C, and NCL VectorPlot examples.

-xyplot

Generate all Fortran, C, and NCL xyPlot examples.

-gsun

Generate all the GSUN examples (NCL scripts only).

-list

Specifies that the names of the selected examples should be echoed to the screen instead of being copied or generated.  This option must be used with one of the other options that selects a particular subset of examples.  For example, if you want to see a list of all the available examples, then use -list in conjunction with the -A option.  If you want to see a list of all the ContourPlot examples, then use -list with the -contourplot option (and so on).

-clean

Remove everything but the ".ncgm" file.

-n

Specifies that the example should just be copied, and not linked or executed.

name(s)

Name(s) of example programs to generate.

Examples Available

Please notice that the C examples end with the letter 'c', the Fortran examples end with the letter 'f', and NCL examples with the letter 'n'.

ap01c,ap01f,ap01n

Demonstrates various ways to use resource files.

basic01c,basic01f,basic01n

Demonstrates how to draw a contour plot using mostly defaults.  No data is used in this example.

basic02c,basic02f,basic02n

Demonstrates how to set the view port and how to produce multiple plots on a single frame.

basic03c,basic03f,basic03n

Demonstrates how to create a scalar data object, set resources using a resource file, set resources during object creation, and set resources after object creation.

basic04c,basic04f,basic04n

Demonstrates how to select and change the workstation device for drawing your output to an NCGM file or an X workstation window.

basic05c,basic05f,basic05n

Demonstrates how to read and manipulate colormaps.

basic06c,basic06f,basic06n

Demonstrates how to position objects on an output device and how to change  their sizes.

basic07c,basic07f,basic07n

Demonstrates creating three simultaneous workstations.

basic08c,basic08f,basic08n

Demonstrates use of a procedure that limits a plot, including annotations that extend outside the plot viewport, to a pre-defined bounding box within NDC space.

basic09c,basic09f,basic09n

Lists all the fonts with their number, name, and what the font looks like.

cn01c,cn01f,cn01n

Shows all the default settings for the ContourPlot resources using a simple data set.

cn02c,cn02f,cn02n

Demonstrates basic features of the ContourPlot object.

cn03c,cn03f,cn03n

Demonstrates basic features of the ContourPlot object.  The first frame emulates the contour plot drawn in cn01.

cn04c,cn04f,cn04n

Emulates the output of the ncargex example "cpex02".

cn05c,cn05f,cn05n

Demonstrates how to create a map plot animation with a contour overlay and labelbar annotation.

cn06c,cn06f,cn06n

Shows how to read a netCDF file and produce a series of temperature contour plots.

cn07c,cn07f,cn07n

Shows how to read a netCDF file and produce a series of contour plots.

cn08c,cn08f,cn08n

Shows how to read a netCDF file and draw a vertical profiles of temperature for longitude separated by 5 degrees.

cn09c,cn09f,cn09n

Shows how to read a netCDF file and produce a series of surface pressure contour plots.

cn10f,cn10c,cn10n

Demonstrates how to read a netCDF file and produce three contour plots, an xyplot, and a map plot.

cn11c,cn11f

Demonstrates how to combine LLU and HLU calls.

cn12c,cn12f,cn12n

Emulates example "cpex08" and draws a filled contour plot over a map of Africa with a labelbar.

cn13c,cn13f,cn13n

Emulates example "mpex10" and draws a raster contour plot over a map using inverse map transformations.

cn14c,cn14f,cn14n

Shows how to do a contour/map overlay with tick marks showing the lat/lon locations.

cn15c,cn15f,cn15n

Shows how to combine contour plot and xy plot on a single frame. Also shows how to do multiple workstation outputs, and how to position your PostScript  output on the page.

cn16c,cn16f,cn16n

Shows how to combine a vector fill contour plot, a raster contour plot, and a map plot on a single frame.

cn17c,cn17f,cn17n

Shows how to restrict a contour plot to a certain area over a satellite projection, how to label the US states with AnnoManager, how to use NhlDataPoly{line,marker} to draw lines/markers on a map projection, and how to mix LLUs/HLUs to draw text in the map projection. The NCL version doesn't have the LLU/HLU part.

lb01c,lb01f,lb01n

Shows all the default settings for the LabelBar resources.

lb02c,lb02f,lb02n

Shows how to modify some of the default resources to create a solid filled set of boxes.

lg01c,lg01f,lg01n

Shows all the default settings for the Legend resources.

lg02c,lg02f,lg02n

Shows how to modify some of the default resources to create a legend of five markers.

lg03c,lg03f,lg03n

Shows how to create a legend of five lines.

pr01c,pr01f,pr01n

Demonstrates basic GraphicStyle capabilities.

pr02c,pr02f,pr02n

Demonstrates GraphicStyle capabilities and how to some GS resources.

pr03c,pr03f,pr03n

Demonstrates graphics primitives drawn in NDC space and how clipping works.

pr04c,pr04f,pr04n

Demonstrates graphics primitives drawn into an IrregularPlot object.

pr05c,pr05f,pr05n

Demonstrates overlaying graphics primitives on a MapPlot.

mp01c,mp01f,mp01n

Demonstrates basic MapPlot capabilities.

mp02c,mp02f,mp02n

Demonstrates individual control of MapPlot areas.

mp03c,mp03f,mp03n

Demonstrates MapPlot masking; loosely emulates the ncargex example "colcon".

mp04c,mp04f,mp04n

Illustrates the use of AnnoManager objects with MapPlot objects.

mp05c,mp05f,mp05n

Shows how to create the ten different map projections.

mp06c,mp06f,mp06n

Shows how to draw county lines in the United States.

mp07c,mp07f,mp07n

Shows how to use high resolution RANGS/GSHHS map database.

nm01c,nm01f,nm01n

Simple example of natural neighbor linear interpolation.

nm02c,nm02f,nm02n

Simple example of natural neighbor linear regridding.

nm03c,nm03f,nm03n

Shows how to retrieve aspects and slopes of an interpolation.

nm04c,nm04f,nm04n

Shows a simple 3D interpolation.

nm05c,nm05f,nm05n

Shows how to vary the exponent of the distances in a simple 2D interpolation..

nm06c,nm06f,nm06n

Smoothing in a simple 2D interpolation.

nm07n

Illustrates use of ftcurv, ftcurv, and ftcurvi.

nm08n

Illustrates use of ftcurvp and ftcurvpi.

nm09n

Illustrates use of ftcurvs and ftcurvps.

nm10n

Illustrates use of ftkurv and ftkurvd.

nm11n

Illustrates use of ftkurvp and ftkurvpd.

nm12n

Illustrates use of ftsurf.

nm13n

Illustrates the use of csa1s.

nm14n

Illustrates the effect of weighting the input points using csa1xs.

nm15n

Illustrates extrapolation into data sparse regions using csa1xs.

nm16n

Illustrates two-dimensional approximation and second-order mixed partial using csa2s and csa2xs.

nm17n,nm18n

Illustrates the use of csa3s.

nm19n

Illustrates the use of csa2ls.

nm20n

Illustrates the use of triangulation and Voronoi diagram capabilities of the cssgrid package.

nm21n

Illustrates the use of the interpolation capabilities of the cssgrid package.

nm22n

Illustrates the use of shgrid. cssgrid package.

st01c,st01f,st01n

Demonstrates basic StreamlinePlot example.

st02c,st02f,st02n

Demonstrates line-drawn streamline arrows and some basic resources.

st03c,st03f,st03n

Shows how to overlay a StreamlinePlot on a map projection.

st04c,st04f,st04n

Shows a StreamlinePlot of wind vector data over a MapPlot.

ti01c,ti01f,ti01n

Shows all the default settings for the Title resources which results in a blank plot.

ti02c,ti01f,ti01n

Turns on the main, x-axis, and y-axis strings to produce a plot with three titles.

ti03c,ti03f,ti03n

Shows how to change resources to get high quality filled and colored titles.

tm01c,tm01f,tm01n

Shows all the default settings for the TickMark resources.

tm02c,tm02f,tm02n

Shows how to modify the resources to create tick marks on the axes.

tm03c,tm03f,tm03n

Shows how to modify the resources to change the scaling and the tick mark labels.

tx01c,tx01f,tx01n

Shows all the default settings for the TextItem resources.

tx02c,tx02f,tx02n

Shows how to modify default resources to produce a text string.

tx03c,tx03f,tx03n

Uses the same resources as example "tx02c", except 114 frames are produced with varying background colors.

tx04c,tx04f,tx04n

Shows how to use the TextItem object of the HLU library.

tx05c,tx05f,tx05n

Demonstrates the TextItem object with text having various heights and  various angles.

tx06c,tx06f,tx06n

Demonstrates TextItem text justifications.

tx07c,tx07f,tx07n

Demonstrates TextItem text spacings and aspect ratios.

tx08c,tx08f,tx08n

Simple Annotation example.

vc01c,vc01f,vc01n

Basic VectorPlot example.

vc02c,vc02f,vc02n

Demonstrates line-drawn vector arrows and the use of some basic VectorPlot resources.

vc03c,vc03f,vc03n

Manipulates the FillArrow resources to demonstrate some of the possible stylistic variations on the appearance of filled vector arrows.

vc04c,vc04f,vc04n

Demonstrates how to rotate a VectorPlot 90 degrees while preserving the original relationship of the data elements.

vc05c,vc05f,vc05n

Demonstrates how to overlay a VectorPlot on a MapPlot.

vc06c,vc06f,vc06n

Demonstrates how to use a scalarfield to determine the color of the vector arrow fill.

vc07c,vc07f,vc07n

Emulates the LLU example "fcover"; shows how to overlay contours and vectors on a MapPlot.

vc08c,vc08f,vc08n

Plots wind vectors at a grid stride of 3. Vectors are colored by wind speed.

vc09c,vc09f,vc09n

Plots an animation of the January 1996 snow storm using wind vectors colored by temperature over a pressure field contour plot.

xy01c,xy01f,xy01n

Shows all the default resources for an xyPlot object.

xy02c,xy02f,xy02n

The same as example xy01c, only with some of the X and Y axis resources tweaked.

xy03c,xy03f,xy03n

The same as example xy01c, but with the data modified a little, and the  line resources tweaked.

xy04c,xy04f,xy04n

Demonstrates how to create an xyPlot with multiple lines.  Some of the line resources are tweaked.

xy05c,xy05f,xy05n

Demonstrates how to create an XyPlot with multiple lines, using multiple data items (except for xy05c, which uses the CoordArrTable object).

xy06c,xy06f,xy06n

Demonstrates how to read in netCDF files to generate various xy plots.

xy07c,xy07f,xy07n

Demonstrates how to draw a "scattergram".

xy08c,xy08f,xy08n

Shows how to use irregular points to change the transformation of your plot.

xy09c,xy09f,xy09n

Shows how to create different kinds of axes.

xy10c,xy10f,xy10n

Shows how to overlay an XyPlot on a MapPlot.

xy11c,xy11f,xy11n

Demonstrates how to display an xyPlot to an X Window, and then copy it to a meta file.

xy12c

Demonstrates how to incorporate the HLU library with a GUI. It uses an X/Motif interface, and also allows the user to copy frames from the X Window to a meta file.

xy13c

Shows how to interactively retrieve data values from a plot by pointing and clicking on the plot.

xy14c,xy14f,xy14n

Demonstrates the data manipulation capabilities of NCL.

xy15c,xy15f,xy15n

Demonstrates the creation of a set of four stacked XyPlots.

xy16c,xy16f,xy16n

Demonstrates how to draw three different xy lines on the same plot, but with different axis scales.

xy17c,xy17f,xy17n

Demonstrates how to stack three xy plots.

See Also

ncargex(1NCARG)

Info

NCARG Nhl EXAMPLES