3794 search results for "gis"

Twinkle,twinkle little STAR

May 26, 2014
By
Twinkle,twinkle little STAR

At the recent R/Finance 2014 conference in Chicago I gave a talk on Smooth Transition AR models and a new package for estimating them called twinkle. In this blog post I will provide a short outline of the models and an introduction to the package and its features. Financial markets have a strong cyclical component

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Twinkle,twinkle little STAR

May 26, 2014
By
Twinkle,twinkle little STAR

At the recent R/Finance 2014 conference in Chicago I gave a talk on Smooth Transition AR models and a new package for estimating them called twinkle. In this blog post I will provide a short outline of the models and an introduction to the package and its features. Financial markets have a strong cyclical component

Read more »

A Sequence of 9 Courses on Data Science Starts on Coursera on 2 June and 7 July 2014

May 26, 2014
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A Sequence of 9 Courses on Data Science Starts on Coursera on 2 June and 7 July 2014

A sequence of 9 courses on Data Science will start on Coursera on 2 June and 7 July 2014, to be lectured by(Associate/Assistant) Professors of Johns Hopkins University. The courses are designed for students to learn to become Data Scientists … Continue reading →

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New R package rainfreq: Rainfall Frequency (or Design Storm) Estimates from the US National Weather Service

May 26, 2014
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New R package rainfreq: Rainfall Frequency (or Design Storm) Estimates from the US National Weather Service

Rainfall estimates at desired frequency (e.g., 1% annual chance or 100-year return period) and duration (e.g., 24-hour) are often required in the design of dams and other hydraulic structures, catastrophe risk modeling, environmental planning and manag...

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Vectorized vs Devectorized

May 24, 2014
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This gist from @hadley has been on my mind for some time. This was already a follow up of this post from @johnmyleswhite. The problem was that sugar vectorised code suffered a performance penalty compared to devectorised code. This is particularly troubling me because the whole point of sugar is to have nice syntax without...

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Vectorized vs Devectorized

May 24, 2014
By

This gist from @hadley has been on my mind for some time. This was already a follow up of this post from @johnmyleswhite. The problem was that sugar vectorised code suffered a performance penalty compared to devectorised code. This is particularly troubling me because the whole point of sugar is to have nice syntax without...

Read more »

A phylogenetic ordination in one line: magrittr Challenge!

May 23, 2014
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A phylogenetic ordination in one line: magrittr Challenge!

A picture suitable for a fancy pipe enthusiast My good friend Andrew recently posted this gist: It shows how to solve a simple programming exercise know as FizzBuzz in R, but also is clearly showing off his already amazing proficiency in the very new R package magrittr. Those are some piping hot coding skillz (or should...

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Regularization implementation in R : Bais and Variance diagnosis

May 22, 2014
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Regularization implementation in R : Bais and Variance diagnosis

Welcome to this blog post. In previous posts I discussed about the linear regression and logistic regression in detail. We used Andrew NG’s ML class dataset to fit linear regression and logistic regression. We also discussed about step by step implementation in R along with cost function and gradient descent. In this post I will The post Regularization...

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Quick History 2: GLMs, R and large data sets

May 22, 2014
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by Joseph Rickert In last week’s post, I sketched out the history of Generalized Linear Models and their implementations. In this post I’ll attempt to outline how GLM functions evolved in R to handle large data sets. The first function to make it possible to build GLM models with datasets that are too big to fit into memory was...

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Conference agenda for EARL conference (September 15th – 17th)

May 21, 2014
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Mango Solutions are pleased to announce details of the full EARL (Effective Applications of the R Language) Conference agenda. EARL will be held at The Tower Hotel in London on September 15th – 17th and will showcase an impressive list of R experts from a wide range of business sectors; for full agenda details listing the speakers and presentations please visit www.earl-conference.com/Agenda.html...

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