https://github.com/cran/pracma
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Tip revision: 63f12837f2d7d6d30cdc2b2df60efdef228d8d0f authored by HwB on 10 May 2011, 00:00:00 UTC
version 0.4-0
Tip revision: 63f1283
NEWS
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  pracma                                                                NEWS
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PLANNED IN NEW VERSION

  NEW FUNCTIONS

    o conv(), deconv(), and detrend().

    o Riemann's Zeta Function zeta().

    o Numerical differentiation with deriv() and hessian(), and
      Richardson's extrapolation in gradient().

CHANGES IN VERSION 0.4-0 (2011-05-10)

  OTHER CHANGES

    o Added tests for functions since version 0.3-7.

CHANGES IN VERSION 0.3-9 (2011-05-09)

  NEW FUNCTIONS

    o and() and or() aliases for all(), any().

  OHER CHANGES
 
    o Removed lgammaz() because of a serious bug.

CHANGES IN VERSION 0.3-8 (2011-05-06)

  NEW FUNCTIONS

    o pchip() and option `cubic' for interp1() interpolation.

    o The complex gamma functions gammaz(), lgammaz().

    o hadamard() and toeplitz() matrices.

  OTHER CHANGES

    o Renamed kernel() to nullspace() because of name clash.

CHANGES IN VERSION 0.3-7 (2011-05-04)

  NEW FUNCTIONS

    o Rank of a matrix, mrank(), and kernel() for the nullspace.

    o orth(), orthogonal basis of the image space, and subspace()
      determines the angle between two subspaces.

    o normest() for estimating the (Frobenius) norm of a matrix, and
      cond() determines the condition number of a matrix.

  OTHER CHANGES

    o Renamed vnorm() to vectornorm() to differentiate it from other
      matrix norms.

CHANGES IN VERSION 0.3-6 (2011-04-30)

  NEW FUNCTIONS

    o fact(), more accurate than the R internal function `factorial'.

    o ezplot() as an alias for curve(), but with option ``fill = TRUE''.

    o aitken() for accelerating iterations.

  OTHER CHANGES

    o Renamed polycnv() to polymul().

    o Renamed outlierMAD() to hampel().

    o Renamed barylag() to barycentricInterp().

CHANGES IN VERSION 0.3-5 (2011-04-23)

  NEW FUNCTIONS

    o agm() for the arithmetic-geometric mean.

    o Lambert W function lambertWp() for the real principal branch.

    o ``Complex Step'' derivation with complexstep() and jacobiancsd().

CHANGES IN VERSION 0.3-4 (2011-04-21)

  NEW FUNCTIONS

    o Barycentric Lagrange interpolation through barylag().

    o polyfit2() fits a polynomial that exactly meets one additional point.

  OTHER CHANGES

    o Added more references to the help entry `pracma-package.Rd'.

CHANGES IN VERSION 0.3-3 (2011-04-19)

  NEW FUNCTIONS

    o hornerdefl() for also returning the deflated polynomial.

    o newtonHorner() combining Newton's method and the Horner scheme for
      for root finding for polynomials.

    o jacobian() computes the Jacobian of a function R^n --> R^m as simple
      numerical derivative.

    o newtonsys() applies Newton's method to functions R^n --> R^n with
      special application to root finding of complex functions.

  OTHER CHANGES

    o newton() renamed to newtonRaphson().

CHANGES IN VERSION 0.3-2 (2011-04-17)

  NEW FUNCTIONS

    o Sorting functions: bubbleSort(), insertionSort(), selectionSort(),
      shellSort(), heapSort(), mergeSort(), mergeOrdered(), quickSort(),
      quickSortx(), is.sorted(), and testSort().

    o Functions from number theory: eulersPhi(), moebiusFun() and the 
      mertensFun(), sigma(), tau(), omega(), and Omega().

CHANGES IN VERSION 0.3-1 (2011-04-16)

  NEW FUNCTIONS

    o Chebyshev polynomials of the first kind: chebPoly(), chebCoeff(),
      and chebApprox().

CHANGES IN VERSION 0.3-0 (2011-04-09)

  OTHER CHANGES

    o New version of news.Rd, news.pdf.

    o More test functions for root finding and quadrature.

CHANGES IN VERSION 0.2-9

  NEW FUNCTIONS

    o fnorm() and the Runge function runge().

    o contfrac(), rat(), and rats() for continuous fractions.

    o meshgrid() and magic().

CHANGES IN VERSION 0.2-8

  NEW FUNCTIONS

    o quad() adaptive Simpson quadrature.

    o Minimum finding with fibsearch() and golden_ratio().

    o Root finding with newton(), secant(), and brentDekker().

CHANGES IN VERSION 0.2-7

  NEW FUNCTIONS

    o Regular expression functions regexp(), regexpi(), regexprep() and
      refindall().

CHANGES IN VERSION 0.2-6

  NEW FUNCTIONS

    o String functions blanks(), strtrim(), deblank(), strjust(),
      and strrep().

    o interp1() one-dimensional interpolation (incl. spline)

CHANGES IN VERSION 0.2-5

  NEW FUNCTIONS

    o Matlab functions mode(), clear() and beep().

CHANGES IN VERSION 0.2-4

  NEW FUNCTIONS

    o primroot() finds the smallest primitive root modulo a given n;
      needed functions are modpower() and modorder().

    o humps() and sinc(): Matlab test functions.

    o Root finding through bisection: bisect(), regulaFalsi().

    o outlierMAD(), findpeaks(), and piecewise().

    o polycnv() for polynomial multiplication.

  OTHER CHANGES

    o Functions extgcd(), gcd(), and lcm() have been renamed to extGCD(),
      GCD(), and LCM() respectively.

CHANGES IN VERSION 0.2-3

  NEW FUNCTIONS

    o strfind(), strfindi(), and findstr().

    o circlefit() fitting a circle to plane points.

    o mldivide() and mrdivide(), emulating the Matlab backslash operator.

CHANGES IN VERSION 0.2-2

  NEW FUNCTIONS

    o vnorm() vector norm

  CORRECTIONS

    o Warning about a nasty "non-ASCII input" in the savgol.RD file
      has been resolved.

CHANGES IN VERSION 0.2-1

  NEW FUNCTIONS

    o horner() implementing the horner scheme for evaluating a polynomial
      and its derivative.

    o savgol() Savitzki-Golay smoothing and needed pseudoinverse pinv().

RESTARTED AS VERSION 0.2-0

  NAME CHANGE

    o Package renamed to 'pracma' to avoid name clashes with packages
      such as 'matlab' that are sticking closer to the original.

  OTHER CHANGES

    o Added 'pracma-package' section to the manual.

CHANGES IN VERSION 0.1-9

  NEW FUNCTIONS

    o reshape(), repmat(), and blkdiag() matrix functions.

    o combs() chooses all combinations of k elements out of n, and
      randcomb() generates a random selection.

    o perms() generates all permutations, randperm() a random permutation.

    o Pascal triangle as pascal(); nchoosek() returns binomial coefficients.

    o Some string functions: strcmp(), strcmpi(), strcat().


CHANGES IN VERSION 0.1-8

  NEW FUNCTIONS

    o std() as refinement of the standard deviation function.

    o ceil() and fix() as aliases for ceiling() and trunc().
      [floor() and round() already exist in R.]

    o Modulo functions mod(), rem() and integer division idiv().

    o Integer functions related to the Euclidean algorithm:
      extgcd(), gcd(), lcm(), coprime(), and modinv().

    o distmat() and crossn(), the vector product in n-dimensional space.

CHANGES IN VERSION 0.1-7

  NEW FUNCTIONS

    o size(), numel(), ndims(), isempty(), and find().

    o eye(), ones(), zeros().

    o Functions returning random numbers: rand(), randn(), randi().

    o linspace(), logspace(), and logseq() for linearly, logarithmically,
      and exponentially spaced sequences.

CHANGES IN VERSION 0.1-6

  NEW FUNCTIONS

    o Matrix functions mdiag() and mtrace() added. inv() is introduced
      as an alias for solve() in R.

    o Generate special matrices hankel(), rosser(), and wilkinson().
      kron() is an alias for the R function kronecker().

  OTHER CHANGES

    o Renamed factors() to ifactor() to distiguish it more clearly from
      factors as used in R.

CHANGES IN VERSION 0.1-5

  NEW FUNCTIONS:

    o Added function for flipping or rotating numeric and complex
      matrices: flipdim(). flipud(), fliplr(), and rot90().

CHANGES IN VERSION 0.1-4

  NEW FUNCTIONS:

    o Added functions for generating sequences of (log-)linearly spaced
      numeric values: linspace() and logspace(). Note that the functions
      in the `matlab' package are not exactly mimicking the corresponding
      Matlab/Octave functions.

    o Added basic complex functions real(), imag(), conj(), and angle()
      which are essentially only aliases of the R functions Re(), Im(), 
      or Conj().

      angle() returns the angle of a complex number in radians. The R
      function Mod() is here only available as abs().

CHANGES IN VERSION 0.1-3

  NEW FUNCTIONS:

    o Added compan() function for the `companion' matrix; the eig() function
      is an alias for the R eigen()values function.

    o Added the polynomial functions poly(), polyder(), polyfit(),
      polyint(), and polyval().

    o roots() returns real and complex roots of polynomials.

  OTHER CHANGES

    o Simplified the trapz() function.

CHANGES IN VERSION 0.1-2

  NEW FUNCTIONS

    o Added functions from number theory: primes(), isprime() and factors().

      The corresponding function for factors() in Matlab/Octave is called
      factor(), but that name should not be shadowed in R!

    o Added the polyarea() and trapz() functions.

CHANGES IN VERSION 0.1-1

  NEW FUNCTIONS

    o Added some simple functions such as nthroot(), pow2(), and nextpow2().

    o dot() and cross() functions for scalar and vector product.

    o Generate matrices through vander() and hilb().

INITIAL VERSION 0.1-0

  INSTALLATION

    o `matlab4r' will be a pure R package without using any source code.
      Therefore, installation will be immediate on all platforms.

  INTENTION

    o This package provides R implementations of more advanced math
      functions from Matlab and Octave (and the Euler Math Toolbox)
      with a special view on optimization and time series routines.
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