#include <itpp/config.h>
#include <itpp/base/itassert.h>
#include <complex>
#include <limits>
Go to the source code of this file.
Namespaces | |
namespace | itpp |
Functions | |
double | asinh (double x) |
Arcus sinhyp. | |
double | acosh (double x) |
Arcus coshyp. | |
double | atanh (double x) |
Arcus tanhyp. | |
double | tgamma (double x) |
True gamma function. | |
double | lgamma (double x) |
Lograrithm of an absolute gamma function. | |
double | cbrt (double x) |
double | itpp::trunc_log (double x) |
Truncated natural logarithm function. | |
double | itpp::trunc_exp (double x) |
Truncated exponential function. | |
double | itpp::gamma (double x) |
Gamma function. | |
double | itpp::Qfunc (double x) |
Q-function. | |
double | itpp::erfinv (double x) |
Inverse of error function. | |
std::complex< double > | itpp::erf (const std::complex< double > &z) |
Error function for complex argument. | |
double | itpp::log2 (double x) |
Base-2 logarithm. | |
double | itpp::logb (double b, double x) |
Base-b logarithm. | |
double | itpp::sinc (double x) |
Sinc function. sinc(x) = sin(pi*x)/pi*x. | |
int | itpp::round_i (double x) |
Round to nearest integer. | |
int | itpp::ceil_i (double x) |
The nearest larger integer. | |
int | itpp::floor_i (double x) |
The nearest smaller integer. | |
double | itpp::round (double x) |
Round to nearest integer, return result in double. | |
bool | itpp::is_int (double x) |
Return true if x is an integer. | |
bool | itpp::is_even (int x) |
Return true if x is an even integer. | |
int | itpp::int2bits (int n) |
Calculate the number of bits needed to represent an inteager n . | |
int | itpp::levels2bits (int n) |
Calculate the number of bits needed to represent n different values (levels). | |
int | itpp::needed_bits (int n) |
Deprecated function. Might be removed in future releases. Please use int2bits() or levels2bits() instead. | |
int | itpp::needed_bits (double n) |
Deprecated function. Might be removed in future releases. Please use int2bits() or levels2bits() instead. | |
int | itpp::pow2i (int x) |
Integer 2^x. | |
int | itpp::pow2 (int x) |
Calculate two to the power of x (2^x). | |
double | itpp::pow2 (double x) |
Calculate two to the power of x (2^x). | |
double | itpp::pow10 (double x) |
Calculate ten to the power of x (10^x). | |
double | itpp::dB (double x) |
Decibel of x (10*log10(x)). | |
double | itpp::inv_dB (double x) |
Inverse of decibel. | |
int | itpp::gray_code (int x) |
Convert to Gray Code. | |
double | itpp::binom (int n, int k) |
Compute the binomial coefficient "n over k" as a float. | |
int | itpp::binom_i (int n, int k) |
Compute the binomial coefficient "n over k" as an integer. | |
double | itpp::log_binom (int n, int k) |
Compute the base 10 logarithm of the binomial coefficient "n over k". | |
double | itpp::rad_to_deg (double x) |
Convert radians to degrees. | |
double | itpp::deg_to_rad (double x) |
Convert degrees to radians. | |
double | itpp::sqr (double x) |
Square of x. | |
double | itpp::sqr (std::complex< double > x) |
Square of complex-valued x, ||x||^2. | |
double | itpp::rem (double x, double y) |
The reminder of the division x/y. | |
double | itpp::sign (double x) |
The sign of x. | |
double | itpp::sgn (double x) |
The sign of x. | |
signed char | itpp::abs (signed char x) |
Absolute value. | |
short | itpp::abs (short x) |
Absolute value. | |
int | itpp::abs (int x) |
Absolute value. | |
double | itpp::fact (int index) |
Calculates factorial coefficient for index <= 170. | |
long | itpp::mod (long k, long n) |
Calculates the modulus, i.e. the signed reminder after division. | |
long | itpp::gcd (long a, long b) |
returns the greatest common divisor (GCD) g of the elements a and b. | |
double | itpp::round_to_zero (double x, double threshold=1e-14) |
Round x to zero if abs(x) is smaller than threshold. | |
std::complex< double > | itpp::round_to_zero (const std::complex< double > &x, double threshold=1e-14) |
Round each part of x smaller than threshold to zero. | |
Variables | |
int | signgam |
const double | itpp::pi = 3.14159265358979323846 |
Constant pi. | |
const double | itpp::m_2pi = 2 * pi |
Constant 2*Pi. | |
const double | itpp::eps = std::numeric_limits<double>::epsilon() |
Constant eps. | |
const double | itpp::log_double_max = std::log(std::numeric_limits<double>::max()) |
Constant definition to speed up trunc_log and trunc_exp functions. | |
const double | itpp::log_double_min = std::log(std::numeric_limits<double>::min()) |
Constant definition to speed up trunc_log and trunc_exp functions. |
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IT++ - C++ library of mathematical, signal processing, speech processing, and communications classes and functions
Copyright (C) 1995-2007 (see AUTHORS file for a list of contributors)
This program 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 2 of the License, or (at your option) any later version.
This program 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 this program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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Definition in file scalfunc.h.
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