# abisen

## 54 Added | 2 Magazines | 27 Likes | 6 Following | 22 Followers | @abisen | Keep up with abisen on Flipboard, a place to see the stories, photos, and updates that matter to you. Flipboard creates a personalized magazine full of everything, from world news to life’s great moments. Download Flipboard for free and search for “abisen”

### A Gentle Introduction to XGBoost for Applied Machine Learning

XGBoost is an algorithm that has recently been dominating applied machine learning and Kaggle competitions for structured or tabular data.XGBoost is …

Algorithms### An Introduction to Gradient Descent and Linear Regression

Gradient descent is one of those “greatest hits” algorithms that can offer a new perspective for solving problems. Unfortunately, it’s rarely taught …

### Model-based Reinforcement Learning with Neural Network Dynamics

Anusha Nagabandi, Gregory Kahn Nov 30, 2017<p><i>Fig 1. A learned neural network dynamics model enables a hexapod robot to learn to run and follow desired</i> …

Machine Learning### Exploring Recurrent Neural Networks

We explore recurrent neural networks, starting with the basics, using a motivating weather modeling problem, and implement and train an RNN in …

Deep Learning### Data Wrangling in Julia based on dplyr Flights Tutorials

A couple of my favorite tutorials for wrangling data in R with dplyr are Hadley Wickham’s dplyr package vignette and Kevin Markham’s dplyr tutorial. …

Python Programming### Intro to Julia: Filtering Rows with R, Python, and Julia

In one of my earlier posts I introduced the Julia programming language by comparing how you can read and write CSV files in R, Python, and Julia. In …

### High-Performance GPU Computing in the Julia Programming Language

Julia is a high-level programming language for mathematical computing that is as easy to use as Python, but as fast as C. The language has been …

### Defining Custom Units in Julia and Python

I’ve been writing code to deal with temperature in different units Celsius, Kelvin and Fahrenheit, because I do calculations involving the gass laws …

Python Programming### Non-Linear regression in Julia

<b>Why Julia ?</b> <br>I gave a talk yesterday at the Tucson Python MeetUp about how Julia and Python can be used to analyze medical images. It turns out that …

Algorithms### Drawing 2.7 billion Points in 10s

When I was reading this blog post about visualizing 2.7 billion points in a minute on a macbook, I got curious how fast this would be in Julia.<p>Not …

Writing### High Order Rosenbrock and Symplectic Methods

For awhile I have been saying that JuliaDiffEq really needs some fast high accuracy stiff solvers and symplectic methods to take it to the next …

### Analyzing LendingClub Data Using JuliaDB

JuliaDB is our take on a package for writing succinct, expressive and fast data processing pipelines. It includes tools to load data from CSV files, …

Data Science### DifferentialEquations.jl 2.0: State of the Ecosystem

In this blog post I want to summarize what we have accomplished with DifferentialEquations' 2.0 release and detail where we are going next. I want to …

Mathematics### Timing in Julia

Timing code is important when you want to benchmark or profile your code. Is it the solution of a linear system or the Monte Carlo integration scheme …

### Big Picture Machine Learning: Classifying Text with Neural Networks and TensorFlow

Developers often say that if you want to get started with machine learning, you should first learn how the algorithms work. But my experience shows …

### Image Stitching: Part 1

This is Part 1 of 2 in my posts about how to stitch two images together using Julia. It’s rough around the edges, since I’m learning how to do this …

### imfilter and arrays

Whereas in my last post I manually wrote a blur kernel and code to convolve an image, I didn’t want to do that every time an image convolution came …

### Image tilings and arrays

In this notebook I decided to get more familiar with Julia basic functions, arrays, and operations by giving myself a small computational photography …

### Getting started with images

To get started with Julia, I wanted to learn more about the ecosystem of image support in Julia. Until now, my tools of choice for manipulating …

### Flipping coins in continuous time: The Poisson process

In this post, I would like to contrast two ways of thinking about a coin flip process—one of which is very intuitive and one of which can be very …

### DynProg Class – Week 1

This post, and other posts with similar tags and headers, are mainly directed at the students who are following the Dynamic Programming course at …

### HDF5 in Julia

So, last summer, my program was producing three dimensional data, and I needed a way to export and save that data from my C++ program. Simple ASCII …

### Runge-Kutta Methods

Ordinary Differential Equation Solvers: Runge-Kutta Methods<p>Christina Lee<p>So what’s an <i>Ordinary Differential Equation</i>?<p>Differential Equation means we …

### Gadfly

I’m Moving to Gadfly<p>Christina Lee<p>So far in this blog, all my plots have either used PyPlot, or the experimental GLVisualize. BUT, NO LONGER!<p>While …

### Logistic regression (Part II - evaluation) - Machine learning blog

This post is a continuation of recent post where we implemented gradient descent method for solving logistic regression problem. Today we will try to …

### Solving logistic regression problem in Julia - Machine learning blog

In this post we will try to implement gradient descent approach to solve logistic regression problem.<p>Please note this is mainly for educational …