!!!!!!!!!!!!!!!!!!!!!!!!!!WARNING!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! As of PDL-2.006_04, the direction of the FFT/IFFT has been reversed to match the usage in the FFTW library and the convention in use generally. !!!!!!!!!!!!!!!!!!!!!!!!!!WARNING!!!...

• PDL::PP - Generate PDL routines from concise descriptions
• PDL::Transform - Coordinate transforms, image warping, and N-D functions
• PDL::Course - A journey through PDL's documentation, from beginner to advanced.
• 8 more results from PDL »

This module implements some algorithms for calculating Fast Fourier Transforms for one-dimensional data sets of size 2^n. The data, assumed to arise from a constant sampling rate, is represented by an array reference $data (as described in the method...

!!!!!!!!!!!!!!!!!!!!!!!!!!WARNING!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! As of PDLA-2.006_04, the direction of the FFT/IFFT has been reversed to match the usage in the FFTW library and the convention in use generally. !!!!!!!!!!!!!!!!!!!!!!!!!!WARNING!!...

• PDLA::Image2D - Miscellaneous 2D image processing functions
• PDLA::Slatec - PDLA interface to the slatec numerical programming library
• PDLA::ImageND - useful image processing in N dimensions
• 1 more result from PDLA-Rest »

* "gsl_fft_complex_radix2_forward($data, $stride, $n) " This function computes the forward FFTs of length $n with stride $stride, on the array reference $data using an in-place radix-2 decimation-in-time algorithm. The length of the transform $n is r...

• Math::GSL::FFT - Fast Fourier Transforms (FFT)
• Math::GSL - Perl interface to the GNU Scientific Library (GSL)

This module makes it easy to analyze audio files with the Fast Fourier Transform and sync the output of the FFT in time for visual representation....

Now that you have some idea how to use "pp_def" to define new PDLA functions it is time to explain the general syntax of "pp_def". "pp_def" takes as arguments first the name of the function you are defining and then a hash list that can contain vario...

• PDLA::Course - A journey through PDLA's documentation, from beginner to advanced.
• PDLA::Index - an index of PDLA documentation
• PDLA::Primitive - primitive operations for pdl
• 2 more results from PDLA-Core »

• Bio::KBase::CDMI::CDMI_APIImpl

PDLA::Transform is a convenient way to represent coordinate transformations and resample images. It embodies functions mapping R^N -> R^M, both with and without inverses. Provision exists for parametrizing functions, and for composing them. You can u...

One of the principal overheads of using Perl for numeric vector calculations is the need to constantly create and destroy a large amount of Perl values (there is no such overhead in calculations over scalars, since Perl knows how to reuse implicit te...

Audio::Data represents audio data to perl in a fairly compact and efficient manner using C via XS to hold data as a C array of "float" values. The use of "float" avoids many issues with dynamic range, and typical "float" has 24-bit mantissa so quanti...

This module provides an interface to the Sphinx feature extraction library which can be used to extract mel-frequency cepstral coefficients from data. These coefficients can then be passed to the "Speech::Recognizer::SPX::uttproc_cepdata" function. Y...

Contains methods that produce images, where every pixel is a function of all pixels in the source image. The process can be described with the mapping function s = M(R) where "s" is the pixel value in the output images, and R is the source image. clo...

new returns an object initialised with the parameters specified in the original C code. e.g. my $gramofile = Audio::Gramofile->new; set_input_file sets the input .wav file for track splitting and signal processing methods. e.g. $gramofile->set_input_...

At present, this module provides one filtering routine. The main purpose is to provide an easy-to-use lowpass filter that only requires the user to provide the data and the cutoff frequency. However, the routines take options to give the user more co...

Consider this alpha software. It is still under fairly active development and the interface may change in incompatible ways. Audio::Analyzer::ToneDetect is a module for detecting single frequency tones in an audio stream or file. It supports mono PCM...

Given a string with algebraic notation, convert to RPN, which is what any crappy dime store calculator needs to do anyway. Doesn't really process anything, that's up to you. You will get an array back with all of the variables and operations in RPN f...

Math::Random::Brownian is a perl module for calculating a realization of either fractional Brownian Motion, or a fractional Gaussian sequence. This is accomplished using the various methods. Currently, the C code for this module is due to Ton Dieker ...

This is a bundle of modules related to numeric algorithms. Please have a look at Bundle::Math. If you would like to see a specific module included in a future version of this bundle, please send me an email or use rt.cpan.org....

Graphics::VTK::Imaging is an interface to the Imaging libaray of the C++ visualization toolkit VTK.....