1880 search results for "tutorial"

R, Python, MATLAB, & Excel Dashboards & Graphs with D3.js & WebGL

April 29, 2015
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R, Python, MATLAB, & Excel Dashboards & Graphs with D3.js & WebGL

Web tools like D3.js and WebGL let you make beautiful, interactive 2D and 3D graphs. You can now publish graphs and dashboards with these technologies using Python, R, MATLAB, & Excel. Publishing and sharing is one extra line of code. This post puts you on your way, no downloads or installations required. We’ll start with ggplot2; scroll to see Python and MATLAB plots in 2D and 3D. See our

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Some basics of biomaRt

April 27, 2015
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Some basics of biomaRt

One of the commonest bioinformatics questions, at Biostars and elsewhere, takes the form: “I have a list of identifiers (X); I want to relate them to a second set of identifiers (Y)”. HGNC gene symbols to Ensembl Gene IDs, for example. When this occurs I have been known to tweet “the answer is BioMart” (there

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Some basics of biomaRt

April 27, 2015
By
Some basics of biomaRt

One of the commonest bioinformatics questions, at Biostars and elsewhere, takes the form: “I have a list of identifiers (X); I want to relate them to a second set of identifiers (Y)”. HGNC gene symbols to Ensembl Gene IDs, for example. When this occurs I have been known to tweet “the answer is BioMart” (there

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Awesome-R: A curated list of the best add-ons for R

April 27, 2015
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One of the great things about R is that there's so much available to use with it: there are several interfaces to choose from, thousands of add-on packages to extend its capabilites, hundreds of books and on-line tutorials — an abundance of riches to improve your R experience. But with that abundance comes a problem: how to find the...

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Back to basics: High quality plots using base R graphics

April 24, 2015
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Today at the Davis R Users’ Group, Michael Koontz gave tour de force lesson in using R’s base graphics capabilities to plot data. Here’s the video: Get Michael’s excellent annotated script, which covers much more than we got to during our tutorial, here.

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The new science journalism and open science

April 23, 2015
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by Joseph Rickert The New York Times is quietly changing the practice of science journalism. The Tuesday April 21, 2015 article: Ebola Lying in Wait, reports on "A growing body of scientific clues - some ambiguous, other substantive" that the Ebola virus may have lain dormant in West African rain forest for years before igniting last year's outbreak. In...

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Time Series Graphs & Eleven Stunning Ways You Can Use Them

April 22, 2015
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Time Series Graphs & Eleven Stunning Ways You Can Use Them

Many graphs use a time series, meaning they measure events over time. William Playfair (1759 - 1823) was a Scottish economist and pioneer of this approach. Playfair invented the line graph. The graph below–one of his most famous–depicts ho...

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Accelerating R with multi-node parallelism – Rmpi, BatchJobs and OpenLava

Accelerating R with multi-node parallelism –  Rmpi, BatchJobs and OpenLava

Gord Sissons, Feng Li In a previous blog we showed how we could use the R BatchJobs package with OpenLava to accelerate a single-threaded k-means calculation by breaking the workload into chunks and running  them as serial jobs. R users frequently need to find solutions to parallelize workloads, and while solutions like multicore and socket

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YaRrr! The Pirate’s Guide to R

April 21, 2015
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YaRrr! The Pirate’s Guide to R

  If you’ve spent more than 30 minutes with me, you probably know that I’m a bit of an R fanatic. When I meet someone doing analytical work who uses software like Excel or SPSS, I inevitably go into my “R Salesman” mode. Unfortunately, after I spend 10-30 minutes trying to explain how great R is ...

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Combining several lattice charts into one

April 21, 2015
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Combining several lattice charts into one

Last week I mentioned the grid.arrange function of the gridExtra package that allows me to combine graphical grid objects onto one page. The latticeExtra package provides another elegant solution for trellis (lattice) plots: the function c.trellis() or...

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