Category Archives: R

Creating an R package

Posted on July 31, 2012 by joelgranados

I recently put all the EcoIP application into an R package. I was surprised at how easy it was and I wanted to share my experience :) Root Path Everything that is to be packaged needs to be in a … Continue reading →

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R. create a plot with non overlapping labels

Posted on May 4, 2012 by joelgranados

The X axis labels were a bit long and they were having trouble fitting into the plot correctly. I tried various solutions: R’s default and maptool’s pointLabel. The first did not really allow me to turn the labels 90 deg … Continue reading →

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R: How to suppress package startup messages

Posted on April 10, 2012 by joelgranados

suppressPackageStartupMessages(library(fields)) And you can still test the result of the `library` or `require` calls: a = suppressPackageStartupMessages(require(fields)) Variable ‘a’ will be TRUE if it was successful, FALSE otherwise.

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Very Painful EBImage install on Windows

Posted on April 5, 2012 by joelgranados

Short Version Follow this to install EBImage Go here to get GTK+. I used this one. Make sure you add the GTK+ “bin” directory to the path. If you have zlib1.dll problems, or any problems regarding the specific dll that is … Continue reading →

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Rscript, where were you all along?

Posted on March 24, 2012 by joelgranados

One of the things that I did not like about using R was that there was not “easy” way of calling it in a command sort of way. The test part of my R workflow consisted in going into the … Continue reading →

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R: Index of an interval of a number in a vector

Posted on March 2, 2012 by joelgranados

Try findInterval :). Let me try to explain what I mean with this title. I have a vector of numbers. The numbers represent bin limits. For example c(1,2,3) is a vector that represents 2 bins. The first is [1,2) and … Continue reading →

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R: Efficient data loading

Posted on March 26, 2011 by joelgranados

I’m working with the HOG_01 directory from this dataset.  They have organized so that each data point is a 1568 line text file.  The data sets are also separated in 43 types.  Unzip the data and you will see what … Continue reading →

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R filter rows based on an element

Posted on March 21, 2011 by joelgranados

I need to separate a matrix based on the existence of an element in a row.  I will end up with two matrices: the first will not contain the element on any of its rows and the second will contain … Continue reading →

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Remove defined variables from R environment

Posted on March 18, 2011 by joelgranados

When I am debugging a piece of code I usually do it inside the R-terminal.  It’s nice to do things this way because you can poke at things when something goes wrong.  The only disadvantage is that you mush “refresh” … Continue reading →

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R : Finding the ordering index vector

Posted on March 1, 2011 by joelgranados

The ordering index vector is a vector that contains indices of another vector.  It’s basically the other vector, but ordered (decreasing or increasing).  Instead of having the values it has the indices :)  I spent close to an hour to … Continue reading →

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