958 search results for "how to import image file to R"

RSI(2) and the pre 80s Market

February 17, 2011
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RSI(2) and the pre 80s Market

In his detailed research on RSI(2) indicator, MarketSci emphasized several times that the contrarian strategies based on the RSI(2) indicator didn’t start working until the 80s. I remembered this observation recently when I observed another interesting anomaly … In statistics, an important initial step in studying time series data is to consider the auto correlation

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Extracting all Crime Data for England and Wales using R and MYSQL

February 14, 2011
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Extracting all Crime Data for England and Wales using R and MYSQL

Last week I started creating some data extraction code for the new England and Wales crime maps website using the R software / language. Although there is an API, a more efficient way of accessing all of the data (and without causing stress to their API server) is to download the CSV files located here

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Reproducing the BMA exercise of Fernández, Ley and Steel (2001) in R

February 7, 2011
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Reproducing the BMA exercise of Fernández, Ley and Steel (2001) in R

In their paper Model uncertainty in cross-country growth regressions (Journal of Applied Econometrics 2001), Fernández, Ley and Steel (FLS) demonstrate the use of Bayesian Model Averaging (BMA) for a cross-section economic growth data set. This tutor...

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Latent Gaussian Models im Zürich [day 2]

February 6, 2011
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Latent Gaussian Models im Zürich [day 2]

The second day at the Latent Gaussian Models workshop in Zürich was equally interesting. Among the morning talks, let me mention Daniel Bové who gave a talk connected with the hyper-g prior paper he wrote with Leo Held (commented in an earlier post) and the duo of Janine Illian and Daniel Simpson who gave enthusiastic

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A gentle introduction to R

January 31, 2011
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A gentle introduction to R

Whenever a post on this blog requires some data analysis and perhaps a chart or two, my tool of choice is the versatile statistical programming package R. Developed as an open-source implementation of an engine for the S programming language, R is therefore free. Since commercial mathematical packages can costs thousands of dollars, this alone

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Blackbox trading Strategy using Rapidminer and R

January 23, 2011
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Blackbox trading Strategy using Rapidminer and R

This my first post in 2011. this post has cost me a bit more than usual, but I hope it meets expectations. The aim of this tutorial is to generate an algorithm based on black box trading, with all the necessary elements for evaluation. That is a first post of several, in order to explore the problems, features of...

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Blackbox trading Strategy using Rapidminer and R

January 23, 2011
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Blackbox trading Strategy using Rapidminer and R

This my first post in 2011. this post has cost me a bit more than usual, but I hope it meets expectations. The aim of this tutorial is to generate an algorithm based on black box trading, with all the necessary elements for evaluation. That is a first post of several, in order to explore the problems, features of...

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Volcanic Solar Dimming, ENSO and Temperature Anomalies

January 21, 2011
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Volcanic Solar Dimming, ENSO and Temperature Anomalies

In previous posts I have shown plots of global temperature anomaly, volcano and Nino34 trends (here , here). In this post , I want to further  explore the role of volcanic eruptions and Nino34 phases (El Nino, La Nina) on … Continue reading →

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Model for nothing – and the bootstrap for free

January 21, 2011
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Model for nothing – and the bootstrap for free

Reconstructing phylogenies is an interesting task, sadly one that often requires to navigate between a multitude of software. To add an unnecessary layer of complexity to the whole thing, most of these softwares speaks different languages, and requires the user to do endless conversions from fasta to phylip to nexus to whatever new format they

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Disable auto-update from R (Windows)

January 21, 2011
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There are two major threats to complex MCMC estimations:Wrong energy settings (hibernate after 2 hours of inactivity)Automatic Updates (install updates at 3 a.m.)I thought about the latter threat. At times, you may hand some R code to other co-workers,...

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