elem_math.h File Reference

Elementary mathematical functions - header file. More...

`#include <itpp/base/help_functions.h>`
`#include <itpp/base/converters.h>`
`#include <cstdlib>`
`#include <itpp/itexports.h>`

Go to the source code of this file.

## Namespaces

namespace | itpp
| itpp namespace

## Functions

double | itpp::sqr (double x)
| Square of x.
double | itpp::sqr (const std::complex< double > &x)
| Absolute square of complex-valued x, ||x||^2.
vec | itpp::sqr (const vec &x)
| Square of elements.
mat | itpp::sqr (const mat &x)
| Square of elements.
vec | itpp::sqr (const cvec &x)
| Absolute square of elements.
mat | itpp::sqr (const cmat &x)
| Absolute square of elements.
vec | itpp::abs (const vec &x)
| Absolute value.
mat | itpp::abs (const mat &x)
| Absolute value.
ivec | itpp::abs (const ivec &x)
| Absolute value.
imat | itpp::abs (const imat &x)
| Absolute value.
vec | itpp::abs (const cvec &x)
| Absolute value.
mat | itpp::abs (const cmat &x)
| Absolute value.
double | itpp::sign (double x)
| Signum function.
vec | itpp::sign (const vec &x)
| Signum function.
mat | itpp::sign (const mat &x)
| Signum function.
double | itpp::sgn (double x)
| Signum function.
vec | itpp::sgn (const vec &x)
| Signum function.
mat | itpp::sgn (const mat &x)
| Signum function.
int | itpp::sign_i (int x)
| Signum function.
ivec | itpp::sign_i (const ivec &x)
| Signum function.
imat | itpp::sign_i (const imat &x)
| Signum function.
int | itpp::sgn_i (int x)
| Signum function.
ivec | itpp::sgn_i (const ivec &x)
| Signum function.
imat | itpp::sgn_i (const imat &x)
| Signum function.
int | itpp::sign_i (double x)
| Signum function.
vec | itpp::sqrt (const vec &x)
| Square root of the elements.
mat | itpp::sqrt (const mat &x)
| Square root of the elements.
double | itpp::gamma (double x)
| Deprecated gamma function - please use tgamma() instead.
vec | itpp::gamma (const vec &x)
| Deprecated gamma function for vectors. Will be changed to tgamma().
mat | itpp::gamma (const mat &x)
| Deprecated gamma function for matrices. Will be changed to tgamma().
double | itpp::rem (double x, double y)
| The reminder of the division x/y.
vec | itpp::rem (const vec &x, double y)
| Elementwise reminder of the division x/y for vec and double.
vec | itpp::rem (double x, const vec &y)
| Elementwise reminder of the division x/y for double and vec.
mat | itpp::rem (const mat &x, double y)
| Elementwise reminder of the division x/y for mat and double.
mat | itpp::rem (double x, const mat &y)
| Elementwise reminder of the division x/y for double and mat.
int | itpp::mod (int k, int n)
| Calculates the modulus, i.e. the signed reminder after division.
double | itpp::fact (int index)
| Calculates factorial coefficient for index <= 170.
double | itpp::binom (int n, int k)
| Compute the binomial coefficient "n over k".
int | itpp::binom_i (int n, int k)
| Compute the binomial coefficient "n over k".
double | itpp::log_binom (int n, int k)
| Compute the base 10 logarithm of the binomial coefficient "n over k".
int | itpp::gcd (int a, int b)
| Compute the greatest common divisor (GCD) g of the elements a and b.
vec | itpp::real (const cvec &x)
| Real part of complex values.
mat | itpp::real (const cmat &x)
| Real part of complex values.
vec | itpp::imag (const cvec &x)
| Imaginary part of complex values.
mat | itpp::imag (const cmat &x)
| Imaginary part of complex values.
vec | itpp::arg (const cvec &x)
| Argument (angle)
mat | itpp::arg (const cmat &x)
| Argument (angle)
vec | itpp::angle (const cvec &x)
| Angle.
mat | itpp::angle (const cmat &x)
| Angle.
cvec | itpp::conj (const cvec &x)
| Conjugate of complex value.
cmat | itpp::conj (const cmat &x)
| Conjugate of complex value.

## Detailed Description

Elementary mathematical functions - header file.

Author
  Tony Ottosson and Adam Piatyszek

Copyright (C) 1995-2010 (see AUTHORS file for a list of contributors)

This file is part of IT++ - a C++ library of mathematical, signal processing, speech processing, and communications classes and functions.

IT++ is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

IT++ is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with IT++. If not, see http://www.gnu.org/licenses/.

Definition in file elem_math.h.

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