2259 search results for "map"

R and Sudoku solvers: Plus ca change…

February 25, 2010
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Christian Robert blogged about a particularly heavy-handed solution to last Sunday's Sudoku puzzle in Le Monde. That had my symapthy as I like evolutionary computing methods, and his chart is rather pretty. From there, this spread on to the REvolutions blogs where David Smith riffed on it, and showed the acual puzzle. That didn't stop things as Christian blogged once more about...

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R and Sudoku solvers: Plus ca change…

February 25, 2010
By

Christian Robert blogged about a particularly heavy-handed solution to last Sunday's Sudoku puzzle in Le Monde. That had my symapthy as I like evolutionary computing methods, and his chart is rather pretty. From there, this spread on to the REvolutions...

Read more »

R and Sudoku solvers: Plus ca change…

February 25, 2010
By

Christian Robert blogged about a particularly heavy-handed solution to last Sunday's Sudoku puzzle in Le Monde. That had my symapthy as I like evolutionary computing methods, and his chart is rather pretty. From there, this spread on to the REvolutions blogs where David Smith riffed on it, and showed the acual puzzle. That didn't stop things as Christian blogged once more about...

Read more »

ggplot2: Plotting Dates, Hours and Minutes

February 24, 2010
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ggplot2: Plotting Dates, Hours and Minutes

Plotting timeseries with dates on x-axis and times on y-axis can be a bit tricky in ggplot2. However, with a little trick this problem can be easily overcome. Let’s assume that I wanted to plot when the sun rises in London in 2010. sunriset function in maptools package calculates the sunrise times using algorithms provided

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The R type system

February 21, 2010
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The R type system

R is a weird beast. Through it's ancestor the S language, it claims a proud heritage reaching back to Bell Labs in the 1970's when S was created as an interactive wrapper around a set of statistical and numerical subroutines. As a programming language,...

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Real-World, Real-Time Analytics

February 17, 2010
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Stop wasting time reading my drivel. You need to head over the the DataWrangling.com blog and read Peter Skomoroch’s interview with Bradford Cross of FlightCaster. Peter wrote up this interview back in August 2009, so I’m a little late to this party. There’s some really great quotes in this interview. Here’s a few of my fav

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How to make a mosaic plot in R

February 16, 2010
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How to make a mosaic plot in R

Mosaic plots (aka treemaps) are a great way to visualize hierarchical data. A collection of rectangles represents all the elements to be visualized (customers, news items, blog posts), with the size and color of the rectangles coding attribute. But what makes this chart unique is the arrangement of the elements: where there is hierarchy (customer segments, news topics, post...

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You can Hadoop it! It’s elastic! Boogie woogie woog-ie!

February 16, 2010
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You can Hadoop it! It’s elastic! Boogie woogie woog-ie!

I just came back from the future and let me be the first to tell you this: Learn some Chinese. And more than just cào nǐ niáng (肏你娘) which your friend in grad school told you means “Live happy with many blessings”. Trust me, I’ve been hanging with Madam Wu and she told me

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Tracking Climate Trends with RClimate Scripts and Links

February 10, 2010
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Tracking Climate Trends with RClimate Scripts and Links

Some of my visitors may have noticed that I have added a new Climate Images page and have been adding climate data images to my right side panel. So far, I have 6 trend charts, 4 map images, 1 photo image and 1  data value  showing the CO2 concentrations, recent total solar irradiance (TSI) ,

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Using the R multicore package in Linux with wild and passionate abandon

February 9, 2010
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Using the R multicore package in Linux with wild and passionate abandon

One of my primary uses for R is to build stochastic simulations of insurance portfolios and reinsurance treaties. It’s not uncommon for each of my simulations to take 20 seconds or more to complete (if you’re doing the math, that’s 55 hours for 10K sims or, approximately 453 games of solitaire) . Initially I ran

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