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Title: Software/Graphics - LASSP Tools Collection of Unix utilities for numerical analysis and graphics, useful both for displaying and to filter data.

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LASSPTools

LASSPTools:

Graphical and Numerical Extensions to Unix

Table of ContentsOVERVIEWSETUPSOURCE AND BINARIESDESCRIPTIONSGraphics andAnimation Analog InputDevicesNumericalAnalysisData filteringMiscellaneousUtilitiesDEMONSTRATIONS

OVERVIEW

LASSPTools is a collection of Unix utilities for numerical analysis andgraphics. It was written around 1990, before Linux, before the World Wide Web.Considering that, many of the tools remain remarkably useful.The operating system of most computers is designed aroundtheir primary use: text processing. We provide thesame system utilities for number crunching and dynamical displays ofresults that are available for sorting, searching, and manipulatingtext files. The files are available without chargevia the World Wide Web.For example, it's currently an incredible pain to plot spheres on yourscreen. We've cured this with PlotAtoms.

Pipe your coordinates to PlotAtoms, and you immediately have a movieof your results! Selecting the figure above will show an mpeg filmcaptured from the original: the quality and speed of the mpeg filmis much inferior to the original. Otherexamples are also available.The LASSP Software toolkit is a set of more than 35 programs for assistingresearchers in physics and engineering. The tools are availableon Linux (recompiled April 2002), and have been compiled on a variety ofother Unix platforms. LASSPTools was developed at Cornell University as part of the Cornell-IBM Joint Study on Computing for Scientific Research.The tools perform various functions and roughly can be grouped into thefollowing categories:Graphics andAnimation: Display matrices, lattice dynamics simulations,polygons and polygonalized surfaces, circles and spheres: watch themchange with time.Analog InputDevices Input numbers with slider bars, input rotationmatrices to turn your figures in three dimensions...NumericalAnalysis Fourier transforms, matrix eigenvalues,inversions, rotations - all as Unix filters.Data filteringsort, prune, histogram, ...MiscellaneousUtilities (some of which were written outside of ourproject). The programs typically are used together in pipelines to generate,manipulate and display data. For example, raw data may be run through anumerical transformation, a section selected via a filtering program andthe results sent to a program to animate the results graphically.

SETUP

In our local setup, we store LASSPTools in `/usr/local/pub/tools', andset our path variables to search there for executables and man pages.To run the programs, you must have `/usr/local/pub/tools/bin' in your`path' environment variable. Here at LASSP, we have anexample of this in `/usr/local/skel/.cshrc'.To access the documentation, you must have `/usr/local/pub/tools/man' inyour MANPATH environment variable. Locals can see an example of this in`/usr/local/skel/.login'.

SOURCE AND BINARIES

The source and binaries are available without charge from the World Wide Web.LASSPTools.demos.tar.Z - Demo programs and data files.LASSPTools.doc.tar.Z - Documentation.LASSPTools.linux.tar.Z - Binaries for Linux, built on a 386 machine.LASSPTools.rs6000.tar.Z - Binaries for the RS6000.LASSPTools.AIX4.1_PowerPC.tar.Z - Binaries for the PowerPC running AIX.LASSPTools.irix5.3.tar.Z - SGI Beta release (thanks to Sumit Bose)LASSPTools.sparc.tar.Z - Binaries for the Sun Sparc.LASSPTools.src.tar.Z - Source code.LASSPTools/src - Directory of source files.

DESCRIPTIONS

The following is a list of the LASSPTools programs and a briefdescription of each program.Analog Input Devices

rotate -Rotate is an interactive data entry device which puts up a rotation ballwith axes, and allows the user to pick a rotation matrix.

slider- Slider is an interactive data entry device which puts up a number ofslider widgets, and allows the user to set values within user specifiedranges.

items- Items produces a data entry window, with output to stdout. (Sliderwithout the sliders.)

XYinput- XYinput is an interactive data entry device which opens a coordinatesplane with an accompanying options menu. It allows the user to specifycoordinate positions by clicking on the 2D plane and pipe them tostdout.Data Filtering Programs:3D-2D -3D-2D is a simple filter for converting lines with triples on them tolines with pairs on them. It also allows extra material which occurs atthe end of line to be passed unmodified.ConvertFrames- ConvertFrames uses the various line_io routines to convert frames ofascii triples to and from binary.ComplexDoubleMatrices- Converts ASCII matrices to and from binary. Double version.ComplexFloatMatrices- Convert ASCII matrices to and from binary. Floating point version.ConvertMatrices- ConvertMatrices uses the various get_matrix and put_matrix routines toconvert ascii to and from binary, and files to and from pipes.ComplexDoubleVectors- Convert ASCII vectors to and from binary. Double version.ComplexFloatVectors- Convert ASCII vectors to and from binary. Floating point version.ConvertVectors- ConvertVectors uses the various get_vector and put_vector routines toconvert ascii to and from binary, and files to and from pipes. Integerversion.RotateFile- RotateFile is a simple filter for rotating triples of data. It caninput the triples only from a file.RotateStream- RotateStream is a simple filter for rotating triples of data. It caninput the triples from a file, pipe or terminal session.blend -Inserts a smooth curve through data points.histogram- Histogram reads a list of numbers from the standard input and produceson the standard output a file suitable for input to axis or graph tomake a histogram.rotate_echo- A simple program that helps RotateStream do non-blocking I/O.rotate_aid- A simple program that helps RotateStream do non-blocking I/O.slab -slab is a simple filter for passing slices of data. It allows one to usea slider to change the size of the slab being looked at.sortit- Sortit is a simple filter which takes blocks of input separated byblank lines and sorts each block in terms of the value of the thirdcolumn of the input, in increasing order.thin -Thin is a simple filter that reduces the amount of data going down apipeline.translate- Translate is a simple filter for translating data sets. It taketriples on lines and adds specified amounts to each coordinate. It alsoallows extra material which occurs at the end of line to be passedunmodified.Numerical Analysis FiltersDI - DI isa linear algebra program for calculating determinants and inverses, orboth. DI accepts matrices from standard input and writes thedeterminants and inverses to standard output. DI uses the doubleprecision Linpack routines to perform its calculations.Forms Demonstration!Random - Random is a random number generator. It allows the use of various generators,generates various probability distributions, generates arrays, sums, etc.Forms Demonstration!Det - Detis a linear algebra program for calculating determinants. Det accepts matrices from standard input and writesthe determinants and inverses to standard output. Det uses the doubleprecision Linpack routines to perform its calculations.Forms Demonstration!Eigen -Eigen is a program for calculating eigenvalues, eigenvectors, or both.Eigen accepts matrices from standard input and writes the eigenvaluesand eigenvectors to standard output. Eigen uses the double precisionEispack routines to perform its calculations.Forms Demonstration!Fourier- Fourier is a program for calculating fourier transforms or inversefourier transforms. Fourier accepts data from standard input and writesthe results to standard output. Fourier uses the doubleprecision fftpack routines to perform its calculations. Fourier does notneed any form of zero padding.Invert -Invert is a linear algebra program for calculating inverses. Invertaccepts matrices from standard input and writes the inverses to standardoutput. Invert uses the double precision Linpack routines to perform itscalculations.Forms Demonstration!MMult -MMult is a program for multiplying two matrices A and B in the order AB.MMult accepts matrices from standard input and writes the product tostandard output. The matrix A must number of columns as the matrix B hasrows. MMult uses the BLAS routines to perform its calculations.MSolve- MSolve is a program for solving linear equations of the form Ax = B,where A and B are known and x is unknown. MSolve accepts matrices fromstandard input and writes the solution to standard output. The matrix Amust be invertable but B can be any matrix that has the same number ofrows as the matrix A has columns. MSolve uses the double precisionLinpack routines to perform its calculations.fit_it- Fit_it does non-linear least squares parameter fitting on a data filespecified on the command line. See also the README in the fit_it srcdir.Graphics and Animation:

DynamicLattice- DynamicLattice is an X-windows graphics program to represent sites ona two-dimensional square (or rectangular) lattice based on their value.This program is "dynamic" in that sites are typically readindividually from the standard input stream (stdin) and plotted one at atime. There are three modes of representation: shading, arrows andbonds. The default mode is shading, whereby sites are filled with acolored cell whose color represents the value of the plotted field atthat site. In the arrow mode, an arrow is plotted at the specified sitewhere its angle represents the value of the field at that site. In thebond mode, a specified bond is drawn from a site to a neighboring site.In both the arrow and bond modes, the symbol can also be colored torepresent another quantity. If such information is not given, allarrows/bonds are colored the same. MPEG Demonstrations available.

PlotAtoms- PlotAtoms is an X-Windows plotting package which accepts x-y pairsfrom standard input and plots these pairs in the form of spheres. It canalso produce multiple pictures in the form of a movie. Other MPEG demonstrations available.

PlotM- PlotM is an X-Windows plotting package which plots atoms in threedimensions, and animates them. It has more sophisticated controls thanPlotAtoms, and can also draw bonds between the atoms or just draw sticksin space.

SurfPlot- SurfPlot is a simple program to produce surface plots in three dimensions.circledraw- Circledraw is an X Window System plotting package which reads a seriesof circle specifications from standard input and draws them in color ina window. Circles can be drawn continuously into the window withoptional clearing of window when specified, or the circles can beplotted off- screen and sent to the screen one-frame-at-atime as in ananimation.

matrix2X- matrix2X reads a set of matrices from the standard input and producesa density plot in an X window. The matrices are rows of numbersseparated by newlines and matrices separated by blank lines (doublenewlines). The plot consists of a series of rectangles mimicking theshape of the input matrix which are colored according to the list ofcolors specified in various possible ways.

meter -Meter is a simple analog style output device. Its level is controlled bythe numbers it reads from stdin and its default range is from 0 to100.

polydraw- polydraw is an X Window System plotting package which reads a seriesof polygon specifications from standard input and draws them in color ina window. Polygons can be drawn continuously into the window withoptional clearing of window when specified, or the polygons can beplotted off-screen and sent to the screen one frame at a time as in ananimation. MPEG Demonstrations available.

polydraw3D- polydraw3D is an X Window System like polydraw but reads in one framepolygons in 3D coordinates and can rotate and do a simulated perspectiveof that frame.Utility Programs:lattice2ps- Lattice2ps is a filter to produce a PostScript file which shadeselements on a two-dimensional square lattice based on their value. Thedefault produces gray-scale shading from white to black based on therange of values input, although a restricted range can be specified.Color PostScript output can also be generated.poly2ps- Poly2ps is filter to produce a PostScript file which draws and shadespolygons. It is designed to read the same input file (ASCII format only)that polydraw reads. The default is to convert the specified RGB colorsto grayscales. This conversion is hard to make general. It will probablyneed modification unless your color scheme is quite simple (e.g., youdraw only red, green, and blue polygons). Alternatively, colorpostscript output can be created.axis -Axis with no options takes pairs of numbers from the standard input asabscissas and ordinates of a graph. Successive points are connected bystraight lines. The graph is encoded on the standard output for displayby the plotfilters (for example hpgl or tek10). If the coordinates of a point arefollowed by a nonnumeric string, that string is printed as a labelbeginning on the point.movieaxis- See axis. This variant allows multiple, movie style, plots to begenerated.branch- Branch is a simple datastream splitter. It takes input from stdin andsplits it into two output streams. One output stream is sent to thefirst command and the other to the second command. Note that bothcommands my have pipes in them.inter -Inter frees the user from the constrained input file format required byaxis, and replaces axis's cryptic commands with real words. The usertypes commands, or inter reads them from commandfile. If you don't wantto remember or learn the appropriate commands, inter0 asks questionsinstead of waiting for instructions.laser -A filter for converting plot5 commands to PostScript and sending theseto a printer.

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LASSPTools Demonstrations!

Entertaining Science done at

LASSP.Last modified: May 22, 1995

Jim Sethna, sethna@lassp.cornell.edu

Collection	of	Unix	utilities
for	numerical	analysis	and	graphics,
useful	both	for	displaying	and
to	filter	data.

http://www.lassp.cornell.edu/LASSPTools/LASSPTools.html

LASSP Tools 2008 September

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Collection of Unix utilities for numerical analysis and graphics, useful both for displaying and to filter data.

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