Package PRACMA

Introduction

This package provides R implementations of more advanced functions in numerical analysis, with a special view on on optimization and time series routines. Uses Matlab/Octave function names where appropriate to simplify porting.

Some of these implementations are the result of courses on Scientific Computing (``Wissenschaftliches Rechnen’’) and are mostly intended to demonstrate how to implement certain algorithms in R/S. Others are implementations of algorithms found in textbooks.

Details

The package encompasses functions from all areas of numerical analysis, for example:

Goals

It serves three main goals:

Besides that, many of these functions could be called in R applications as they do not have comparable counterparts in other R packages (at least at this moment, as far as I know).

All referenced books have been utilized in one way or another. Web links have been provided where reasonable.

Emulated MATLAB Functions

The following 220 functions are emulations of correspondingly named Matlab functions and bear the same signature as their Matlab cousins if possible:

accumarray, acosd, acot, acotd, acoth, acsc, acscd, acsch, and, angle, ans,
arrayfun, asec, asecd, asech, asind, atand, atan2d,  
beep, bernoulli, blank, blkdiag, bsxfun,  
cart2pol, cart2sph, cd, ceil, circshift, clear, compan, cond, conv,  
cosd, cot, cotd, coth, cross, csc, cscd, csch, cumtrapz,  
dblquad, deblank, deconv, deg2rad, detrend, deval, disp, dot,  
eig, eigint, ellipj, ellipke, eps, erf, erfc, erfcinv, erfcx, erfi, erfinv,  
errorbar, expint, expm, eye, ezcontour, ezmesh, ezplot, ezpolar, ezsurf,  
fact, fftshift, figure, findpeaks, findstr, flipdim, fliplr, flipud,  
fminbnd, fmincon, fminsearch, fminunc, fplot, fprintf, fsolve, fzero,  
gammainc, gcd, geomean, gmres, gradient,  
hadamard, hankel, harmmean, hilb, histc, humps, hypot,  
idivide, ifft, ifftshift, inpolygon, integral, integral2, integral3,  
interp1, interp2, inv, isempty, isprime,  
kron,  
legendre, linprog, linspace, loglog, logm, logseq, logspace, lsqcurvefit,  
lsqlin, lsqnonlin, lsqnonneg, lu,  
magic, meshgrid, mkpp, mldivide, mod, mrdivide,  
nchoosek, ndims, nextpow2, nnz, normest, nthroot, null, num2str, numel,  
ode23, ode23s, ones, or, orth,  
pascal, pchip, pdist, pdist2, peaks, perms, piecewise, pinv, plotyy,  
pol2cart, polar, polyfit, polyint, polylog, polyval, pow2, ppval,  
primes, psi, pwd,  
quad, quad2d, quadgk, quadl, quadprog, quadv, quiver,  
rad2deg, randi, randn, randsample, rat, rats, regexp, regexpi,  
regexpreg, rem, repmat, roots, rosser, rot90, rref, runge,  
sec, secd, sech, semilogx, semilogy, sinc, sind, size, sortrows, sph2cart,  
sqrtm, squareform, std, str2num, strcat, strcmp, strcmpi,  
strfind, strfindi, strjust, subspace,  
tand, tic, toc, trapz, tril, trimmean, triplequad, triu,  
vander, vectorfield, ver,  
what, who, whos, wilkinson,  
zeros, zeta

The following Matlab function names have been capitalized in `pracma’ to avoid shadowing functions from R base or one of its recommended packages (on request of Bill Venables and because of Brian Ripley’s CRAN policies):

Diag, factos, finds, Fix, Imag, Lcm, Mode, Norm, nullspace (<- null),
Poly, Rank, Real, Reshape, strRep, strTrim, Toeplitz, Trace, uniq (<- unique).

To use ans instead of ans() – as is common practice in Matlab – type (and similar for other Matlab commands):

makeActiveBinding("ans", function() .Last.value, .GlobalEnv)
makeActiveBinding("who", who(), .GlobalEnv)

Note

The R package `matlab’ contains some of the basic routines from Matlab, but unfortunately not any of the higher math routines.

References

Abramowitz, M., and I. A. Stegun (1972). Handbook of Mathematical Functions (with Formulas, Graphs, and Mathematical Tables). Dover, New York. http://www.nr.com/aands/.

Arndt, J. (2010). Matters Computational: Ideas, Algorithms, Source Code. Springer-Verlag, Berlin Heidelberg Dordrecht. FXT: a library of algorithms: http://www.jjj.de/fxt/.

Cormen, Th. H., Ch. E. Leiserson, and R. L. Rivest (2009). Introduction to Algorithms. Third Edition, The MIT Press, Cambridge, MA.

Encyclopedia of Mathematics (2012). Editor-in-Chief: Ulf Rehmann. http://www.encyclopediaofmath.org/.

Gautschi, W. (1997). Numerical Analysis: An Introduction. Birkhaeuser, Boston.

Gentle, J. E. (2009). Computational Statistics. Springer Science+Business Media LCC, New York.

Hazewinkel, M., Editor (2002). Encyclopaedia of Mathematics. Springer-Verlag, Berlin Heidelberg New York. http://eom.springer.de/.

MathWorld.com (2011). Matlab Central: http://www.mathworks.com/matlabcentral/. Mathtools.net: http://www.mathtools.net/.

NIST: National Institute of Standards and Technology. Olver, F. W. J., et al. (2010). NIST Handbook of Mathematical Functions. Cambridge University Press. Internet: NIST Digital Library of Mathematical Functions, http://dlmf.nist.gov/; Dictionary of Algorithms and Data Structures, http://www.nist.gov/; Guide to Available Mathematical Software, http://gams.nist.gov/

Press, W. H., S. A. Teukolsky, W. T Vetterling, and B. P. Flannery (2007). Numerical Recipes: The Art of Numerical Computing. Third Edition, incl. Numerical Recipes Software, Cambridge University Press, New York. http://www.nrbook.com/a/bookcpdf.php [chapters], or http://apps.nrbook.com/c/index.html [pages].

Quarteroni, A., R. Sacco, and F. Saleri (2007). Numerical Mathematics. Second Edition, Springer-Verlag, Berlin Heidelberg.

Skiena, St. S. (2008). The Algorithm Design Manual. Second Edition, Springer-Verlag, London. The Stony Brook Algorithm Repository: http://www.cs.sunysb.edu/~algorith/.

Stoer, J., and R. Bulirsch (2002). Introduction to Numerical Analysis. Third Edition, Springer-Verlag, New York.

Strang, G. (2007). Computational Science and Engineering. Wellesley-Cambridge Press. Matlab Codes: http://www-math.mit.edu/cse/

Weisstein, E. W. (2003). CRC Concise Encyclopedia of Mathematics. Second Edition, Chapman & Hall/CRC Press. Wolfram MathWorld: http://mathworld.wolfram.com/.

Zhang, S., and J. Jin (1996). Computation of Special Functions. John Wiley & Sons.