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pracma                                                                NEWS
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PLANNED IN NEXT VERSION

NEW FUNCTIONS

o Barycentric interpolation through barylag() and barylag2d().

CHANGES IN VERSION 0.3-0

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 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 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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