James Drew jdrew1303

Machine Learning for Finance

A CQF elective with Dr. Yves J. Hilpisch, The Python Quants GmbH

General resources:

http://tpq.io

Typing vagrant from the command line will display a list of all available commands.

Be sure that you are in the same directory as the Vagrantfile when running these commands!

Creating a VM

vagrant init -- Initialize Vagrant with a Vagrantfile and ./.vagrant directory, using no specified base image. Before you can do vagrant up, you'll need to specify a base image in the Vagrantfile.
vagrant init <boxpath> -- Initialize Vagrant with a specific box. To find a box, go to the public Vagrant box catalog. When you find one you like, just replace it's name with boxpath. For example, vagrant init ubuntu/trusty64.

Starting a VM

vagrant up -- starts vagrant environment (also provisions only on the FIRST vagrant up)

GCC compiler optimization for ARM-based systems

2017-03-03 fm4dd

The gcc compiler can optimize code by taking advantage of CPU specific features. Especially for ARM CPU's, this can have impact on application performance. ARM CPU's, even under the same architecture, could be implemented with different versions of floating point units (FPU). Utilizing full FPU potential improves performance of heavier operating systems such as full Linux distributions.

-mcpu, -march: Defining the CPU type and architecture

These flags can both be used to set the CPU type. Setting one or the other is sufficient.

Fundamentals: why state machines?

States. The final frontier. These are the voyages of an enterprising developer. Her eternal mission: to explore strange new techniques, to seek out better ways to engineer for mental models and new design patterns. To boldly go where a few awesome devs have gone before.

So you’ve found our poignant guide to SCXML and surely you’re wondering “Why should I want to go out of my way to use formal state machines?” or something like that. Hopefully this introduction addresses that kind of question.

	#!/usr/bin/env python
	# -- coding: utf-8 --

	# Copyright 2016 Massachusetts Institute of Technology

	"""Extract images from a rosbag.
	"""

	import os
	import argparse

	# show message definition
	rosmsg show sensor_msgs/CameraInfo

	# show message type
	rostopic type rosout

	# quick message definition view
	rostopic type rosout \| rosmsg show

	# echo message live content

	#!/usr/bin/env python
	# -- coding: utf-8 --

	# Copyright 2016 Massachusetts Institute of Technology

	"""Publish a video as ROS messages.
	"""

	import argparse

	# sudo apt-get install python-picamera

	import picamera
	from time import sleep

	camera = picamera.PiCamera()
	camera.capture('image.jpg')
	camera.start_preview()
	camera.vflip = True
	camera.hflip = True