gorbatschow

% Spectral analysis etudes
% This etude demonstrates window function effect on multi-tone signal
% - Try to change wtype variable to see the effect 
% code by [email protected]

clear

% PARAMETERS
% -------------------------------------------------------------------------

gorbatschow

% Spectral analysis etudes
% This etude demonstrates window function effect on single-tone signal
% code by [email protected]

clear

% PARAMETERS
% -------------------------------------------------------------------------

% Sample rate (Hz)

gorbatschow

% Spectral analysis etudes
% This etude demonstrates spectrum amplitude error when frequency is not a
% product of df by integer
% - Try to change f1 variable  to see wrong amplitude on spectrum 
% - Try to change NFFT variable to see zero-padding effect.
% code by [email protected]

clear

% PARAMETERS

gorbatschow

% Spectral analysis etudes
% This etude demonstrates spectrum for multitone signal with different
% amplitudes.
% code by [email protected]

clear

% PARAMETERS
% -------------------------------------------------------------------------

gorbatschow

// An example of runtime image generation using Dear ImGui & GLFW
// c++ code by [email protected]
// Usage:
// RuntimeImage m_image;
// m_image.setSize(50, 50);
// m_image.setColor(255, 0, 255, 255);
// m_image.updateTexture();
// ImGui::Image((void*)(intptr_t)m_image.textureId(), m_image.imageSize());

#pragma once

gorbatschow

// Linear interpolation procedure
// c++ code by [email protected]
// SEE
// http://www.cplusplus.com/forum/general/216928/

template<typename T>
inline T InterpolateLin(const T* data_x, const T* data_y, size_t data_length, T x, size_t& i)
{
    if (x >= data_x[data_length - 2]) i = data_length - 2;
    else while (x > data_x[i + 1]) i++;

gorbatschow

// Largest-Triangle-Three-Buckets algorithm 
// SEE
// https://github.com/sveinn-steinarsson/flot-downsample
// https://www.base.is/flot/
// c++ port by [email protected]

template<typename T>
inline void DownsampleLTTB(const T* data_x, const T* data_y, size_t data_length, 
    T* sampled_x, T* sampled_y, size_t threshold)
{