Gist "To do" list

Gist "To do" list.md

Gist "To do" list

Here is my to-do list for Gists/things I intend to write Gists about:

• Generic Bayesian linear regression: as basis functions, define some classes with __call__ methods (EG Gaussian, polynomials) which take appropriate parameters to their __init__ method (EG location, scale, polynomial order); a given Bayesian linear regression solution should accept a list of basis functions, whose outputs for each data point can be calculated with the built-in map function, or numpy.vectorise, and compare the output with the MAP and ML solutions, EG:

import numpy as np

class Sigmoid:
    def __init__(self, loc): self.loc = loc
    def __call__(self, x): return 1.0 / (1.0 + np.exp(self.loc - x))

loc_list = np.linspace(0, 1, 10) # 10 basis functions
basis_functions = [Sigmoid(loc) for loc in loc_list]
x = np.linspace(0, 1, 20) # 20 data points
phi = np.array([b(x) for b in basis_functions]) # (10, 20) design matrix

• Repeat above with Newton's method (+ line-search?) for logistic regression
• DSP Gists:
  • HMM
  • Kalman filtering
  • Spectrogram (STFT?)
  • PSD tests? See 3F1/3F3 notes
  • Resampling using Fourier methods; try different methods to avoid ringing by applying a function before resampling and then applying the inverse function after resampling, EG:
    • Subtracting a linear-least squares interpolation of the data
    • Subtracting a line which interpolates the first and last data points
    • Multiplying element-wise by a non-zero window which is tapered at the edges (EG Hamming window)
• Speed tests Gist:
  • Turn the code into a speed_test function, which accepts a test-function as an argument
  • Add an optional warmup time; the warmup time works by initiating a signal.alarm (only after registering a signal-handler) and then running the test function in a loop until the signal.alarm is raised; the signal-handler raises a time-out error which is caught in the loop and sets a flag, which makes the loop exit, at which point the code can go into the rest of the speed_test function
  • Make the speed_test function able to accept multiple test_functions so that it can make a comparison and plot the results on a graph
• Gist about linked lists in C: add description of why linked lists are useful/when to use them
• Gist about writing "Hello world" to a file: add 2 alternative approaches using system and execl
• A single Gist containing the following functions:
  • fork
  • execle
  • strerror(errno)
  • fileno
  • dup2
  • exit
  • waitpid (<sys/wait.h>
• Preprocessor directives in C
• Useful GCC compiler flags
• Basic Java usage
• Basic threading/multiprocessing/mapping tutorial
• Basic Docker commands and volumes
• Writing functions for frequently saving matplotlib.pyplot images
• Logging