/*! ****************************************************************************
\defgroup SYS_LOADING_GROUP DSPL-2.0 Dynamic linking functions.
This group describes the functions for DSPL-2.0 library using in 
an user applications. DSPL-2.0  is cross-platform library  an uses 
common dynamic linking interface in Linux and Windows OS.


\defgroup TYPES_GROUP DSPL-2.0 data types.
This group describes DSPL-2.0 data types and functions and macros for
data types conversion.

\defgroup DFT_GROUP Discrete Fourier transform and fast Fourier transform algorithms

\defgroup WIN_GROUP Windows function for filter design and spectrum analysis.

\defgroup PSD_GROUP Digital spectral analysis

\defgroup HILBERT_GROUP Hilbert transform algorithms.

\defgroup FILTER_CONV_GROUP Convolution and digital filtration.
This group describes functions for linear and circular convolutions, 
FIR filtration and IIR filtration.

\defgroup IIR_FILTER_DESIGN_GROUP  IIR filters design.

\defgroup FIR_FILTER_DESIGN_GROUP  FIR filter design.

\defgroup FILTER_ANALYSIS_GROUP Analog and digital filter analysis.
This group describes the algorithm for calculation 
parameters for analog and digital filters: Magnitude, phase response,
groupdelay, impulse response and other.  

\defgroup RESAMPLING_GROUP Digital samplerate conversion (resampling)


\defgroup ARRAY_GROUP Basic operations for real and complex arrays.


\defgroup SPEC_MATH_COMMON_GROUP Basic math functions of the real and complex arguments.

\defgroup SPEC_MATH_POLY_GROUP Polynomial functions and analysis.

\defgroup SPEC_MATH_TRIG_GROUP Trigonometric and hyperbolic of functions the real and complex arguments.

\defgroup SPEC_MATH_TRANSCEND Transcendent math functions

\defgroup SPEC_MATH_ELLIP_GROUP Elliptic Jacobi functions of the real and complex arguments.

\defgroup SPEC_MATH_RAND_GEN_GROUP Pseudo-random numbers generation
This group describes the functions of the pseudo-random numbers generation
by different algorithms.

\defgroup SPEC_MATH_STAT_GROUP Math statistic functions.

\defgroup SPEC_MATH_LINALG_GROUP Linear algebra and matrix operations.
This group describes the linear algebra algorithms and matrix operations.
DSPL-2.0 using internal interface for BLAS and LAPACK packages. 

\defgroup IN_OUT_GROUP Input and output data from external files.

\defgroup PLOT_GROUP Plotting data by Gnuplot interface.

\defgroup ERROR_CODE_GROUP Error codes.
This group describes error codes, which can be returned from
DSPL-2.0 functions.
**************************************************************************** */