3618 search results for "gis"

Malawi Animated Rainfall Map

June 1, 2014
By
Malawi Animated Rainfall Map

Couple of months ago, Charles Langton Vanya of Malawi contacted me on how to make animated rainfall map  in R. I was very busy that I was not able to respond. Anyway, to Mr. Vanya, here is the code you can play on to produce a similar map as below.

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Trimming the Fat from glm() Models in R

May 30, 2014
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Trimming the Fat from glm() Models in R

One of the attractive aspects of logistic regression models (and linear models in general) is their compactness: the size of the model grows in the number of coefficients, not in the size of the training data. With R, though, glm models are not so concise; we noticed this to our dismay when we tried to Related posts:

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Simple analysis of a few aspects of the Wikipedia World cup 2014 squads data

May 29, 2014
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Simple analysis of a few aspects of the Wikipedia World cup 2014 squads data

The data and script for this post can be found on this gist . The data is taken from wikipedia(http://en.wikipedia.org/wiki/2014_FIFA_World_Cup_squads). The script analyses the data to create interesting charts about the 2014 world cup squads. Charts i...

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5th MilanoR meeting postponed to June 4

May 29, 2014
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5th MilanoR meeting postponed to June 4

Dear R users and enthusiasts, MilanoR staff announces the MilanoR meeting scheduled on Friday May 30 is postponed, due to a strike. The 5th MilanoR meeting will be on Wednesday 4 June, at 6 pm. The meeting will take place at: Fiori … Continue reading →

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Shortcuts for quantmod

May 28, 2014
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Over the years, there have been a couple of issues I have been trying to address in my daily use of this excellent package. Both are “cosmetic” improvements, they only improve the usability of the package. Let me share them and see whether they can be improved further.:) First, let’s reduce the typing involved with

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Using Volcano Plots in R to Visualize Microarray and RNA-seq Results

May 28, 2014
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Using Volcano Plots in R to Visualize Microarray and RNA-seq Results

I've been asked a few times how to make a so-called volcano plot from gene expression results. A volcano plot typically plots some measure of effect on the x-axis (typically the fold change) and the statistical significance on the y-axis (typically the...

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Which came first, the preference or the choice?

May 27, 2014
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Obviously, preference precedes choice because choices are made to maximize preference. That is certainly the way we conduct our marketing research. We generate factorial designs and write descriptions full of information about products and services. Ou...

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How Do Cities Feel?

May 27, 2014
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How Do Cities Feel?

If you are lost and feel alone, circumnavigate the globe (For You, Coldplay) You can not consider yourself a R-blogger until you do an analysis of Twitter using twitteR package. Everybody knows it. So here I go. Inspired by the fabulous work of Jonathan Harris I decided to compare human emotions of people living (or

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Towards (Yet) Another R Colour Palette Generator. Step One: Quentin Tarantino.

May 27, 2014
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Towards (Yet) Another R Colour Palette Generator. Step One: Quentin Tarantino.

Why?I love colours, I love using colours even more. Unfortunately, I have to admit that I don't understand colours well enough to use them properly. It is the same frustration that I had about one year ago when I first realised that I couldn't plot anything better than the defaults in Excel and Matlab! It...

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PERFORMANCE: captureOutput() is much faster than capture.output()

May 26, 2014
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PERFORMANCE: captureOutput() is much faster than capture.output()

The R function capture.output() can be used to “collect” the output of functions such as cat() and print() to strings. For example, > s <- capture.output({+ cat("Hello\nworld!\n")+ print(pi)+ })> s "Hello" "world!" " 3.141593" More precisely, it...

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